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Finding the Fourth Proportional to 100,479.88, 138,657.21 and 58,035.88

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Solution

The fourth proportional to 100,479.88, 138,657.21 and 58,035.88 is: 80,086.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,479.88 : 138,657.21 = 58,035.88 : x
  2. Step 2: Convert to fraction form
    100,479.88/138,657.21 = 58,035.88/x
  3. Step 3: Cross multiply
    100,479.88x = 138,657.21 × 58,035.88
  4. Step 4: Simplify right side
    100,479.88x = 8,047,093,200.69
  5. Step 5: Solve for x
    x = 8,047,093,200.69/100,479.88
  6. Step 6: Final answer
    x = 80,086.61

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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.