Home / 90,798,875.20-136,198,312.80-85,872,001.60

Finding the Fourth Proportional to 90,798,875.20, 136,198,312.80 and 85,872,001.60

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Solution

The fourth proportional to 90,798,875.20, 136,198,312.80 and 85,872,001.60 is: 128,808,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,798,875.20 : 136,198,312.80 = 85,872,001.60 : x
  2. Step 2: Convert to fraction form
    90,798,875.20/136,198,312.80 = 85,872,001.60/x
  3. Step 3: Cross multiply
    90,798,875.20x = 136,198,312.80 × 85,872,001.60
  4. Step 4: Simplify right side
    90,798,875.20x = 11,695,621,734,678,900
  5. Step 5: Solve for x
    x = 11,695,621,734,678,900/90,798,875.20
  6. Step 6: Final answer
    x = 128,808,002.40

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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.