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Finding the Fourth Proportional to 72,437.60, 108,656.40 and 66,735.20

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Solution

The fourth proportional to 72,437.60, 108,656.40 and 66,735.20 is: 100,102.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,437.60 : 108,656.40 = 66,735.20 : x
  2. Step 2: Convert to fraction form
    72,437.60/108,656.40 = 66,735.20/x
  3. Step 3: Cross multiply
    72,437.60x = 108,656.40 × 66,735.20
  4. Step 4: Simplify right side
    72,437.60x = 7,251,206,585.28
  5. Step 5: Solve for x
    x = 7,251,206,585.28/72,437.60
  6. Step 6: Final answer
    x = 100,102.80

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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.