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Finding the Fourth Proportional to 65,358.48, 89,607.08 and 64,177.44

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Solution

The fourth proportional to 65,358.48, 89,607.08 and 64,177.44 is: 87,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,358.48 : 89,607.08 = 64,177.44 : x
  2. Step 2: Convert to fraction form
    65,358.48/89,607.08 = 64,177.44/x
  3. Step 3: Cross multiply
    65,358.48x = 89,607.08 × 64,177.44
  4. Step 4: Simplify right side
    65,358.48x = 5,750,753,000.28
  5. Step 5: Solve for x
    x = 5,750,753,000.28/65,358.48
  6. Step 6: Final answer
    x = 87,987.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.