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Finding the Fourth Proportional to 118,432.53, 163,421.15 and 76,048.47

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Solution

The fourth proportional to 118,432.53, 163,421.15 and 76,048.47 is: 104,936.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,432.53 : 163,421.15 = 76,048.47 : x
  2. Step 2: Convert to fraction form
    118,432.53/163,421.15 = 76,048.47/x
  3. Step 3: Cross multiply
    118,432.53x = 163,421.15 × 76,048.47
  4. Step 4: Simplify right side
    118,432.53x = 12,427,928,042.90
  5. Step 5: Solve for x
    x = 12,427,928,042.90/118,432.53
  6. Step 6: Final answer
    x = 104,936.78

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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.