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Finding the Fourth Proportional to 83,432.80, 124,954.80 and 81,762.40

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Solution

The fourth proportional to 83,432.80, 124,954.80 and 81,762.40 is: 122,453.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,432.80 : 124,954.80 = 81,762.40 : x
  2. Step 2: Convert to fraction form
    83,432.80/124,954.80 = 81,762.40/x
  3. Step 3: Cross multiply
    83,432.80x = 124,954.80 × 81,762.40
  4. Step 4: Simplify right side
    83,432.80x = 10,216,604,339.52
  5. Step 5: Solve for x
    x = 10,216,604,339.52/83,432.80
  6. Step 6: Final answer
    x = 122,453.09

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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.