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Finding the Fourth Proportional to 136,001.61, 187,628.45 and 78,630.39

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Solution

The fourth proportional to 136,001.61, 187,628.45 and 78,630.39 is: 108,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,001.61 : 187,628.45 = 78,630.39 : x
  2. Step 2: Convert to fraction form
    136,001.61/187,628.45 = 78,630.39/x
  3. Step 3: Cross multiply
    136,001.61x = 187,628.45 × 78,630.39
  4. Step 4: Simplify right side
    136,001.61x = 14,753,297,805.44
  5. Step 5: Solve for x
    x = 14,753,297,805.44/136,001.61
  6. Step 6: Final answer
    x = 108,478.85

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1.5x scale

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.