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Finding the Fourth Proportional to 123,883.50, 170,959.68 and 72,898.20

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Solution

The fourth proportional to 123,883.50, 170,959.68 and 72,898.20 is: 100,599.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,883.50 : 170,959.68 = 72,898.20 : x
  2. Step 2: Convert to fraction form
    123,883.50/170,959.68 = 72,898.20/x
  3. Step 3: Cross multiply
    123,883.50x = 170,959.68 × 72,898.20
  4. Step 4: Simplify right side
    123,883.50x = 12,462,652,944.58
  5. Step 5: Solve for x
    x = 12,462,652,944.58/123,883.50
  6. Step 6: Final answer
    x = 100,599.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.