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Finding the Fourth Proportional to 125,487,687.60, 188,231,531.40 and 120,704,718.60

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Solution

The fourth proportional to 125,487,687.60, 188,231,531.40 and 120,704,718.60 is: 181,057,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,487,687.60 : 188,231,531.40 = 120,704,718.60 : x
  2. Step 2: Convert to fraction form
    125,487,687.60/188,231,531.40 = 120,704,718.60/x
  3. Step 3: Cross multiply
    125,487,687.60x = 188,231,531.40 × 120,704,718.60
  4. Step 4: Simplify right side
    125,487,687.60x = 22,720,434,029,284,064
  5. Step 5: Solve for x
    x = 22,720,434,029,284,064/125,487,687.60
  6. Step 6: Final answer
    x = 181,057,077.90

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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.