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Finding the Fourth Proportional to 118,419.60, 177,337.80 and 56,017.20

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Solution

The fourth proportional to 118,419.60, 177,337.80 and 56,017.20 is: 83,887.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,419.60 : 177,337.80 = 56,017.20 : x
  2. Step 2: Convert to fraction form
    118,419.60/177,337.80 = 56,017.20/x
  3. Step 3: Cross multiply
    118,419.60x = 177,337.80 × 56,017.20
  4. Step 4: Simplify right side
    118,419.60x = 9,933,967,010.16
  5. Step 5: Solve for x
    x = 9,933,967,010.16/118,419.60
  6. Step 6: Final answer
    x = 83,887.86

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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.