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Finding the Fourth Proportional to 99,651,191.20, 149,476,786.80 and 83,495,384.80

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Solution

The fourth proportional to 99,651,191.20, 149,476,786.80 and 83,495,384.80 is: 125,243,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651,191.20 : 149,476,786.80 = 83,495,384.80 : x
  2. Step 2: Convert to fraction form
    99,651,191.20/149,476,786.80 = 83,495,384.80/x
  3. Step 3: Cross multiply
    99,651,191.20x = 149,476,786.80 × 83,495,384.80
  4. Step 4: Simplify right side
    99,651,191.20x = 12,480,621,832,533,562
  5. Step 5: Solve for x
    x = 12,480,621,832,533,562/99,651,191.20
  6. Step 6: Final answer
    x = 125,243,077.20

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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.