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Finding the Fourth Proportional to 118,489.56, 163,516.68 and 64,773.60

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Solution

The fourth proportional to 118,489.56, 163,516.68 and 64,773.60 is: 89,388.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,489.56 : 163,516.68 = 64,773.60 : x
  2. Step 2: Convert to fraction form
    118,489.56/163,516.68 = 64,773.60/x
  3. Step 3: Cross multiply
    118,489.56x = 163,516.68 × 64,773.60
  4. Step 4: Simplify right side
    118,489.56x = 10,591,564,023.65
  5. Step 5: Solve for x
    x = 10,591,564,023.65/118,489.56
  6. Step 6: Final answer
    x = 89,388.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.