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Finding the Fourth Proportional to 71,872.76, 99,187.47 and 40,041.65

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Solution

The fourth proportional to 71,872.76, 99,187.47 and 40,041.65 is: 55,259.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,872.76 : 99,187.47 = 40,041.65 : x
  2. Step 2: Convert to fraction form
    71,872.76/99,187.47 = 40,041.65/x
  3. Step 3: Cross multiply
    71,872.76x = 99,187.47 × 40,041.65
  4. Step 4: Simplify right side
    71,872.76x = 3,971,629,462.19
  5. Step 5: Solve for x
    x = 3,971,629,462.19/71,872.76
  6. Step 6: Final answer
    x = 55,259.18

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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.