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Finding the Fourth Proportional to 87,318,904.30, 130,978,356.45 and 60,109,125.10

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Solution

The fourth proportional to 87,318,904.30, 130,978,356.45 and 60,109,125.10 is: 90,163,687.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,318,904.30 : 130,978,356.45 = 60,109,125.10 : x
  2. Step 2: Convert to fraction form
    87,318,904.30/130,978,356.45 = 60,109,125.10/x
  3. Step 3: Cross multiply
    87,318,904.30x = 130,978,356.45 × 60,109,125.10
  4. Step 4: Simplify right side
    87,318,904.30x = 7,872,994,413,245,442
  5. Step 5: Solve for x
    x = 7,872,994,413,245,442/87,318,904.30
  6. Step 6: Final answer
    x = 90,163,687.65

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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.