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Finding the Fourth Proportional to 251,915.10, 377,864.55 and 83,443.20

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Solution

The fourth proportional to 251,915.10, 377,864.55 and 83,443.20 is: 125,162.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,915.10 : 377,864.55 = 83,443.20 : x
  2. Step 2: Convert to fraction form
    251,915.10/377,864.55 = 83,443.20/x
  3. Step 3: Cross multiply
    251,915.10x = 377,864.55 × 83,443.20
  4. Step 4: Simplify right side
    251,915.10x = 31,530,227,218.56
  5. Step 5: Solve for x
    x = 31,530,227,218.56/251,915.10
  6. Step 6: Final answer
    x = 125,162.12

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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.