Home / 81,320.04-121,972.86-28,726.92

Finding the Fourth Proportional to 81,320.04, 121,972.86 and 28,726.92

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Solution

The fourth proportional to 81,320.04, 121,972.86 and 28,726.92 is: 43,087.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,320.04 : 121,972.86 = 28,726.92 : x
  2. Step 2: Convert to fraction form
    81,320.04/121,972.86 = 28,726.92/x
  3. Step 3: Cross multiply
    81,320.04x = 121,972.86 × 28,726.92
  4. Step 4: Simplify right side
    81,320.04x = 3,503,904,591.39
  5. Step 5: Solve for x
    x = 3,503,904,591.39/81,320.04
  6. Step 6: Final answer
    x = 43,087.84

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1.5x scale

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.