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Finding the Fourth Proportional to 77,247.60, 115,957.80 and 72,171.60

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Solution

The fourth proportional to 77,247.60, 115,957.80 and 72,171.60 is: 108,338.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,247.60 : 115,957.80 = 72,171.60 : x
  2. Step 2: Convert to fraction form
    77,247.60/115,957.80 = 72,171.60/x
  3. Step 3: Cross multiply
    77,247.60x = 115,957.80 × 72,171.60
  4. Step 4: Simplify right side
    77,247.60x = 8,368,859,958.48
  5. Step 5: Solve for x
    x = 8,368,859,958.48/77,247.60
  6. Step 6: Final answer
    x = 108,338.12

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1.5x scale

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.