Home / 81,167.32-121,814.16-53,079.76

Finding the Fourth Proportional to 81,167.32, 121,814.16 and 53,079.76

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Solution

The fourth proportional to 81,167.32, 121,814.16 and 53,079.76 is: 79,660.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,167.32 : 121,814.16 = 53,079.76 : x
  2. Step 2: Convert to fraction form
    81,167.32/121,814.16 = 53,079.76/x
  3. Step 3: Cross multiply
    81,167.32x = 121,814.16 × 53,079.76
  4. Step 4: Simplify right side
    81,167.32x = 6,465,866,377.40
  5. Step 5: Solve for x
    x = 6,465,866,377.40/81,167.32
  6. Step 6: Final answer
    x = 79,660.96

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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.