Home / 81,154.28-121,726.87-21,985.61

Finding the Fourth Proportional to 81,154.28, 121,726.87 and 21,985.61

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Solution

The fourth proportional to 81,154.28, 121,726.87 and 21,985.61 is: 32,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,154.28 : 121,726.87 = 21,985.61 : x
  2. Step 2: Convert to fraction form
    81,154.28/121,726.87 = 21,985.61/x
  3. Step 3: Cross multiply
    81,154.28x = 121,726.87 × 21,985.61
  4. Step 4: Simplify right side
    81,154.28x = 2,676,238,826.74
  5. Step 5: Solve for x
    x = 2,676,238,826.74/81,154.28
  6. Step 6: Final answer
    x = 32,977.17

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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.