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Finding the Fourth Proportional to 82,886.80, 124,330.20 and 20,557.30

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Solution

The fourth proportional to 82,886.80, 124,330.20 and 20,557.30 is: 30,835.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,886.80 : 124,330.20 = 20,557.30 : x
  2. Step 2: Convert to fraction form
    82,886.80/124,330.20 = 20,557.30/x
  3. Step 3: Cross multiply
    82,886.80x = 124,330.20 × 20,557.30
  4. Step 4: Simplify right side
    82,886.80x = 2,555,893,220.46
  5. Step 5: Solve for x
    x = 2,555,893,220.46/82,886.80
  6. Step 6: Final answer
    x = 30,835.95

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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.