Home / 81,864.64-122,791.40-31,935.52

Finding the Fourth Proportional to 81,864.64, 122,791.40 and 31,935.52

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Solution

The fourth proportional to 81,864.64, 122,791.40 and 31,935.52 is: 47,901.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,864.64 : 122,791.40 = 31,935.52 : x
  2. Step 2: Convert to fraction form
    81,864.64/122,791.40 = 31,935.52/x
  3. Step 3: Cross multiply
    81,864.64x = 122,791.40 × 31,935.52
  4. Step 4: Simplify right side
    81,864.64x = 3,921,407,210.53
  5. Step 5: Solve for x
    x = 3,921,407,210.53/81,864.64
  6. Step 6: Final answer
    x = 47,901.11

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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.