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Finding the Fourth Proportional to 118,497.56, 163,527.72 and 64,781.60

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Solution

The fourth proportional to 118,497.56, 163,527.72 and 64,781.60 is: 89,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,497.56 : 163,527.72 = 64,781.60 : x
  2. Step 2: Convert to fraction form
    118,497.56/163,527.72 = 64,781.60/x
  3. Step 3: Cross multiply
    118,497.56x = 163,527.72 × 64,781.60
  4. Step 4: Simplify right side
    118,497.56x = 10,593,587,345.95
  5. Step 5: Solve for x
    x = 10,593,587,345.95/118,497.56
  6. Step 6: Final answer
    x = 89,399.20

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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.