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Finding the Fourth Proportional to 20,687,616,070.90, 31,031,424,106.35 and 20,687,616,070.90

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Solution

The fourth proportional to 20,687,616,070.90, 31,031,424,106.35 and 20,687,616,070.90 is: 31,031,424,106.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687,616,070.90 : 31,031,424,106.35 = 20,687,616,070.90 : x
  2. Step 2: Convert to fraction form
    20,687,616,070.90/31,031,424,106.35 = 20,687,616,070.90/x
  3. Step 3: Cross multiply
    20,687,616,070.90x = 31,031,424,106.35 × 20,687,616,070.90
  4. Step 4: Simplify right side
    20,687,616,070.90x = 641,966,188,045,439,991,808
  5. Step 5: Solve for x
    x = 641,966,188,045,439,991,808/20,687,616,070.90
  6. Step 6: Final answer
    x = 31,031,424,106.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.