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Finding the Fourth Proportional to 91,257.60, 136,827.20 and 38,652.80

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Solution

The fourth proportional to 91,257.60, 136,827.20 and 38,652.80 is: 57,954.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,257.60 : 136,827.20 = 38,652.80 : x
  2. Step 2: Convert to fraction form
    91,257.60/136,827.20 = 38,652.80/x
  3. Step 3: Cross multiply
    91,257.60x = 136,827.20 × 38,652.80
  4. Step 4: Simplify right side
    91,257.60x = 5,288,754,396.16
  5. Step 5: Solve for x
    x = 5,288,754,396.16/91,257.60
  6. Step 6: Final answer
    x = 57,954.13

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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.