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Finding the Fourth Proportional to 206,858,577.60, 310,287,866.40 and 91,720,900.80

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Solution

The fourth proportional to 206,858,577.60, 310,287,866.40 and 91,720,900.80 is: 137,581,351.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,858,577.60 : 310,287,866.40 = 91,720,900.80 : x
  2. Step 2: Convert to fraction form
    206,858,577.60/310,287,866.40 = 91,720,900.80/x
  3. Step 3: Cross multiply
    206,858,577.60x = 310,287,866.40 × 91,720,900.80
  4. Step 4: Simplify right side
    206,858,577.60x = 28,459,882,613,518,052
  5. Step 5: Solve for x
    x = 28,459,882,613,518,052/206,858,577.60
  6. Step 6: Final answer
    x = 137,581,351.20

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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.