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Finding the Fourth Proportional to 135,660.76, 187,233.72 and 79,061.20

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Solution

The fourth proportional to 135,660.76, 187,233.72 and 79,061.20 is: 109,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,660.76 : 187,233.72 = 79,061.20 : x
  2. Step 2: Convert to fraction form
    135,660.76/187,233.72 = 79,061.20/x
  3. Step 3: Cross multiply
    135,660.76x = 187,233.72 × 79,061.20
  4. Step 4: Simplify right side
    135,660.76x = 14,802,922,583.66
  5. Step 5: Solve for x
    x = 14,802,922,583.66/135,660.76
  6. Step 6: Final answer
    x = 109,117.20

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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.