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Finding the Fourth Proportional to 91,277.60, 136,857.20 and 38,672.80

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Solution

The fourth proportional to 91,277.60, 136,857.20 and 38,672.80 is: 57,984.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,277.60 : 136,857.20 = 38,672.80 : x
  2. Step 2: Convert to fraction form
    91,277.60/136,857.20 = 38,672.80/x
  3. Step 3: Cross multiply
    91,277.60x = 136,857.20 × 38,672.80
  4. Step 4: Simplify right side
    91,277.60x = 5,292,651,124.16
  5. Step 5: Solve for x
    x = 5,292,651,124.16/91,277.60
  6. Step 6: Final answer
    x = 57,984.12

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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.