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Finding the Fourth Proportional to 85,967,097.60, 128,950,646.40 and 80,924,102.40

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Solution

The fourth proportional to 85,967,097.60, 128,950,646.40 and 80,924,102.40 is: 121,386,153.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967,097.60 : 128,950,646.40 = 80,924,102.40 : x
  2. Step 2: Convert to fraction form
    85,967,097.60/128,950,646.40 = 80,924,102.40/x
  3. Step 3: Cross multiply
    85,967,097.60x = 128,950,646.40 × 80,924,102.40
  4. Step 4: Simplify right side
    85,967,097.60x = 10,435,215,313,819,792
  5. Step 5: Solve for x
    x = 10,435,215,313,819,792/85,967,097.60
  6. Step 6: Final answer
    x = 121,386,153.60

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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.