Home / 135,811.29-187,416-75,381.78

Finding the Fourth Proportional to 135,811.29, 187,416 and 75,381.78

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Solution

The fourth proportional to 135,811.29, 187,416 and 75,381.78 is: 104,024.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,811.29 : 187,416 = 75,381.78 : x
  2. Step 2: Convert to fraction form
    135,811.29/187,416 = 75,381.78/x
  3. Step 3: Cross multiply
    135,811.29x = 187,416 × 75,381.78
  4. Step 4: Simplify right side
    135,811.29x = 14,127,751,680.48
  5. Step 5: Solve for x
    x = 14,127,751,680.48/135,811.29
  6. Step 6: Final answer
    x = 104,024.87

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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.