Home / 71,990.18-99,345.48-40,159.61

Finding the Fourth Proportional to 71,990.18, 99,345.48 and 40,159.61

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Solution

The fourth proportional to 71,990.18, 99,345.48 and 40,159.61 is: 55,419.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,990.18 : 99,345.48 = 40,159.61 : x
  2. Step 2: Convert to fraction form
    71,990.18/99,345.48 = 40,159.61/x
  3. Step 3: Cross multiply
    71,990.18x = 99,345.48 × 40,159.61
  4. Step 4: Simplify right side
    71,990.18x = 3,989,675,732.06
  5. Step 5: Solve for x
    x = 3,989,675,732.06/71,990.18
  6. Step 6: Final answer
    x = 55,419.72

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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.