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Finding the Fourth Proportional to 73,158.66, 109,713.15 and 20,555.91

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Solution

The fourth proportional to 73,158.66, 109,713.15 and 20,555.91 is: 30,826.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,158.66 : 109,713.15 = 20,555.91 : x
  2. Step 2: Convert to fraction form
    73,158.66/109,713.15 = 20,555.91/x
  3. Step 3: Cross multiply
    73,158.66x = 109,713.15 × 20,555.91
  4. Step 4: Simplify right side
    73,158.66x = 2,255,253,637.22
  5. Step 5: Solve for x
    x = 2,255,253,637.22/73,158.66
  6. Step 6: Final answer
    x = 30,826.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.