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Finding the Fourth Proportional to 121,397.94, 182,178.72 and 42,512.85

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Solution

The fourth proportional to 121,397.94, 182,178.72 and 42,512.85 is: 63,797.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,397.94 : 182,178.72 = 42,512.85 : x
  2. Step 2: Convert to fraction form
    121,397.94/182,178.72 = 42,512.85/x
  3. Step 3: Cross multiply
    121,397.94x = 182,178.72 × 42,512.85
  4. Step 4: Simplify right side
    121,397.94x = 7,744,936,596.55
  5. Step 5: Solve for x
    x = 7,744,936,596.55/121,397.94
  6. Step 6: Final answer
    x = 63,797.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.