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Finding the Fourth Proportional to 118,394.73, 163,385.30 and 64,680.64

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Solution

The fourth proportional to 118,394.73, 163,385.30 and 64,680.64 is: 89,259.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,394.73 : 163,385.30 = 64,680.64 : x
  2. Step 2: Convert to fraction form
    118,394.73/163,385.30 = 64,680.64/x
  3. Step 3: Cross multiply
    118,394.73x = 163,385.30 × 64,680.64
  4. Step 4: Simplify right side
    118,394.73x = 10,567,865,753.59
  5. Step 5: Solve for x
    x = 10,567,865,753.59/118,394.73
  6. Step 6: Final answer
    x = 89,259.60

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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.