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Finding the Fourth Proportional to 124,719.80, 187,079.70 and 82,729.40

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Solution

The fourth proportional to 124,719.80, 187,079.70 and 82,729.40 is: 124,094.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,719.80 : 187,079.70 = 82,729.40 : x
  2. Step 2: Convert to fraction form
    124,719.80/187,079.70 = 82,729.40/x
  3. Step 3: Cross multiply
    124,719.80x = 187,079.70 × 82,729.40
  4. Step 4: Simplify right side
    124,719.80x = 15,476,991,333.18
  5. Step 5: Solve for x
    x = 15,476,991,333.18/124,719.80
  6. Step 6: Final answer
    x = 124,094.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.