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Finding the Fourth Proportional to 118,390.92, 163,376.76 and 64,676.16

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Solution

The fourth proportional to 118,390.92, 163,376.76 and 64,676.16 is: 89,251.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,390.92 : 163,376.76 = 64,676.16 : x
  2. Step 2: Convert to fraction form
    118,390.92/163,376.76 = 64,676.16/x
  3. Step 3: Cross multiply
    118,390.92x = 163,376.76 × 64,676.16
  4. Step 4: Simplify right side
    118,390.92x = 10,566,581,470.04
  5. Step 5: Solve for x
    x = 10,566,581,470.04/118,390.92
  6. Step 6: Final answer
    x = 89,251.62

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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.