Home / 81,729.62-112,789.76-45,918.90

Finding the Fourth Proportional to 81,729.62, 112,789.76 and 45,918.90

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Solution

The fourth proportional to 81,729.62, 112,789.76 and 45,918.90 is: 63,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729.62 : 112,789.76 = 45,918.90 : x
  2. Step 2: Convert to fraction form
    81,729.62/112,789.76 = 45,918.90/x
  3. Step 3: Cross multiply
    81,729.62x = 112,789.76 × 45,918.90
  4. Step 4: Simplify right side
    81,729.62x = 5,179,181,710.46
  5. Step 5: Solve for x
    x = 5,179,181,710.46/81,729.62
  6. Step 6: Final answer
    x = 63,369.70

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1.5x scale

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.