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Finding the Fourth Proportional to 135,863.56, 187,493.88 and 75,438.10

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Solution

The fourth proportional to 135,863.56, 187,493.88 and 75,438.10 is: 104,105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,863.56 : 187,493.88 = 75,438.10 : x
  2. Step 2: Convert to fraction form
    135,863.56/187,493.88 = 75,438.10/x
  3. Step 3: Cross multiply
    135,863.56x = 187,493.88 × 75,438.10
  4. Step 4: Simplify right side
    135,863.56x = 14,144,182,068.83
  5. Step 5: Solve for x
    x = 14,144,182,068.83/135,863.56
  6. Step 6: Final answer
    x = 104,105.78

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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.