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Finding the Fourth Proportional to 124,040.43, 185,913.02 and 86,396.70

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Solution

The fourth proportional to 124,040.43, 185,913.02 and 86,396.70 is: 129,492.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,040.43 : 185,913.02 = 86,396.70 : x
  2. Step 2: Convert to fraction form
    124,040.43/185,913.02 = 86,396.70/x
  3. Step 3: Cross multiply
    124,040.43x = 185,913.02 × 86,396.70
  4. Step 4: Simplify right side
    124,040.43x = 16,062,270,983.05
  5. Step 5: Solve for x
    x = 16,062,270,983.05/124,040.43
  6. Step 6: Final answer
    x = 129,492.22

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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.