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Finding the Fourth Proportional to 57,712.60, 86,568.90 and 54,256.60

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Solution

The fourth proportional to 57,712.60, 86,568.90 and 54,256.60 is: 81,384.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,712.60 : 86,568.90 = 54,256.60 : x
  2. Step 2: Convert to fraction form
    57,712.60/86,568.90 = 54,256.60/x
  3. Step 3: Cross multiply
    57,712.60x = 86,568.90 × 54,256.60
  4. Step 4: Simplify right side
    57,712.60x = 4,696,934,179.74
  5. Step 5: Solve for x
    x = 4,696,934,179.74/57,712.60
  6. Step 6: Final answer
    x = 81,384.90

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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.