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Finding the Fourth Proportional to 57,910.40, 86,865.60 and 54,411.20

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Solution

The fourth proportional to 57,910.40, 86,865.60 and 54,411.20 is: 81,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,910.40 : 86,865.60 = 54,411.20 : x
  2. Step 2: Convert to fraction form
    57,910.40/86,865.60 = 54,411.20/x
  3. Step 3: Cross multiply
    57,910.40x = 86,865.60 × 54,411.20
  4. Step 4: Simplify right side
    57,910.40x = 4,726,461,534.72
  5. Step 5: Solve for x
    x = 4,726,461,534.72/57,910.40
  6. Step 6: Final answer
    x = 81,616.80

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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.