Home / 83,409.28-125,113.98-21,079.76

Finding the Fourth Proportional to 83,409.28, 125,113.98 and 21,079.76

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Solution

The fourth proportional to 83,409.28, 125,113.98 and 21,079.76 is: 31,619.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,409.28 : 125,113.98 = 21,079.76 : x
  2. Step 2: Convert to fraction form
    83,409.28/125,113.98 = 21,079.76/x
  3. Step 3: Cross multiply
    83,409.28x = 125,113.98 × 21,079.76
  4. Step 4: Simplify right side
    83,409.28x = 2,637,372,671.04
  5. Step 5: Solve for x
    x = 2,637,372,671.04/83,409.28
  6. Step 6: Final answer
    x = 31,619.66

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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.