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Finding the Fourth Proportional to 125,561.60, 188,342.40 and 115,938.80

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Solution

The fourth proportional to 125,561.60, 188,342.40 and 115,938.80 is: 173,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,561.60 : 188,342.40 = 115,938.80 : x
  2. Step 2: Convert to fraction form
    125,561.60/188,342.40 = 115,938.80/x
  3. Step 3: Cross multiply
    125,561.60x = 188,342.40 × 115,938.80
  4. Step 4: Simplify right side
    125,561.60x = 21,836,191,845.12
  5. Step 5: Solve for x
    x = 21,836,191,845.12/125,561.60
  6. Step 6: Final answer
    x = 173,908.20

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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.