Home / 81,691.16-122,544.29-31,775.04

Finding the Fourth Proportional to 81,691.16, 122,544.29 and 31,775.04

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Solution

The fourth proportional to 81,691.16, 122,544.29 and 31,775.04 is: 47,665.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.16 : 122,544.29 = 31,775.04 : x
  2. Step 2: Convert to fraction form
    81,691.16/122,544.29 = 31,775.04/x
  3. Step 3: Cross multiply
    81,691.16x = 122,544.29 × 31,775.04
  4. Step 4: Simplify right side
    81,691.16x = 3,893,849,795.96
  5. Step 5: Solve for x
    x = 3,893,849,795.96/81,691.16
  6. Step 6: Final answer
    x = 47,665.50

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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.