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Finding the Fourth Proportional to 135,524.30, 187,026.23 and 78,939.32

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Solution

The fourth proportional to 135,524.30, 187,026.23 and 78,939.32 is: 108,937.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,524.30 : 187,026.23 = 78,939.32 : x
  2. Step 2: Convert to fraction form
    135,524.30/187,026.23 = 78,939.32/x
  3. Step 3: Cross multiply
    135,524.30x = 187,026.23 × 78,939.32
  4. Step 4: Simplify right side
    135,524.30x = 14,763,722,680.58
  5. Step 5: Solve for x
    x = 14,763,722,680.58/135,524.30
  6. Step 6: Final answer
    x = 108,937.83

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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.