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Finding the Fourth Proportional to 78,044.87, 107,702.20 and 42,234.87

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Solution

The fourth proportional to 78,044.87, 107,702.20 and 42,234.87 is: 58,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,044.87 : 107,702.20 = 42,234.87 : x
  2. Step 2: Convert to fraction form
    78,044.87/107,702.20 = 42,234.87/x
  3. Step 3: Cross multiply
    78,044.87x = 107,702.20 × 42,234.87
  4. Step 4: Simplify right side
    78,044.87x = 4,548,788,204.54
  5. Step 5: Solve for x
    x = 4,548,788,204.54/78,044.87
  6. Step 6: Final answer
    x = 58,284.27

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1.5x scale

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.