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Finding the Fourth Proportional to 65,658.60, 98,487.90 and 18,905.40

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Solution

The fourth proportional to 65,658.60, 98,487.90 and 18,905.40 is: 28,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,658.60 : 98,487.90 = 18,905.40 : x
  2. Step 2: Convert to fraction form
    65,658.60/98,487.90 = 18,905.40/x
  3. Step 3: Cross multiply
    65,658.60x = 98,487.90 × 18,905.40
  4. Step 4: Simplify right side
    65,658.60x = 1,861,953,144.66
  5. Step 5: Solve for x
    x = 1,861,953,144.66/65,658.60
  6. Step 6: Final answer
    x = 28,358.10

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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.