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Finding the Fourth Proportional to 75,079.99, 103,695.42 and 51,165.15

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Solution

The fourth proportional to 75,079.99, 103,695.42 and 51,165.15 is: 70,665.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,079.99 : 103,695.42 = 51,165.15 : x
  2. Step 2: Convert to fraction form
    75,079.99/103,695.42 = 51,165.15/x
  3. Step 3: Cross multiply
    75,079.99x = 103,695.42 × 51,165.15
  4. Step 4: Simplify right side
    75,079.99x = 5,305,591,718.61
  5. Step 5: Solve for x
    x = 5,305,591,718.61/75,079.99
  6. Step 6: Final answer
    x = 70,665.86

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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.