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Finding the Fourth Proportional to 91,992,708.80, 137,989,063.20 and 69,034,457.60

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Solution

The fourth proportional to 91,992,708.80, 137,989,063.20 and 69,034,457.60 is: 103,551,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992,708.80 : 137,989,063.20 = 69,034,457.60 : x
  2. Step 2: Convert to fraction form
    91,992,708.80/137,989,063.20 = 69,034,457.60/x
  3. Step 3: Cross multiply
    91,992,708.80x = 137,989,063.20 × 69,034,457.60
  4. Step 4: Simplify right side
    91,992,708.80x = 9,526,000,132,744,118
  5. Step 5: Solve for x
    x = 9,526,000,132,744,118/91,992,708.80
  6. Step 6: Final answer
    x = 103,551,686.40

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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.