Home / 83,988.46-125,981.15-20,808.72

Finding the Fourth Proportional to 83,988.46, 125,981.15 and 20,808.72

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Solution

The fourth proportional to 83,988.46, 125,981.15 and 20,808.72 is: 31,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,988.46 : 125,981.15 = 20,808.72 : x
  2. Step 2: Convert to fraction form
    83,988.46/125,981.15 = 20,808.72/x
  3. Step 3: Cross multiply
    83,988.46x = 125,981.15 × 20,808.72
  4. Step 4: Simplify right side
    83,988.46x = 2,621,506,371.58
  5. Step 5: Solve for x
    x = 2,621,506,371.58/83,988.46
  6. Step 6: Final answer
    x = 31,212.70

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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.