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Finding the Fourth Proportional to 77,910.80, 107,587.71 and 58,757.76

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Solution

The fourth proportional to 77,910.80, 107,587.71 and 58,757.76 is: 81,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,910.80 : 107,587.71 = 58,757.76 : x
  2. Step 2: Convert to fraction form
    77,910.80/107,587.71 = 58,757.76/x
  3. Step 3: Cross multiply
    77,910.80x = 107,587.71 × 58,757.76
  4. Step 4: Simplify right side
    77,910.80x = 6,321,612,843.13
  5. Step 5: Solve for x
    x = 6,321,612,843.13/77,910.80
  6. Step 6: Final answer
    x = 81,139.11

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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.