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Finding the Fourth Proportional to 78,044.70, 107,701.96 and 42,234.70

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Solution

The fourth proportional to 78,044.70, 107,701.96 and 42,234.70 is: 58,284.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,044.70 : 107,701.96 = 42,234.70 : x
  2. Step 2: Convert to fraction form
    78,044.70/107,701.96 = 42,234.70/x
  3. Step 3: Cross multiply
    78,044.70x = 107,701.96 × 42,234.70
  4. Step 4: Simplify right side
    78,044.70x = 4,548,760,200.99
  5. Step 5: Solve for x
    x = 4,548,760,200.99/78,044.70
  6. Step 6: Final answer
    x = 58,284.04

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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.