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Finding the Fourth Proportional to 125,881.60, 188,822.40 and 76,115.20

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Solution

The fourth proportional to 125,881.60, 188,822.40 and 76,115.20 is: 114,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,881.60 : 188,822.40 = 76,115.20 : x
  2. Step 2: Convert to fraction form
    125,881.60/188,822.40 = 76,115.20/x
  3. Step 3: Cross multiply
    125,881.60x = 188,822.40 × 76,115.20
  4. Step 4: Simplify right side
    125,881.60x = 14,372,254,740.48
  5. Step 5: Solve for x
    x = 14,372,254,740.48/125,881.60
  6. Step 6: Final answer
    x = 114,172.80

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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.