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Finding the Fourth Proportional to 123,423.60, 170,321.12 and 73,122.60

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Solution

The fourth proportional to 123,423.60, 170,321.12 and 73,122.60 is: 100,907.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,423.60 : 170,321.12 = 73,122.60 : x
  2. Step 2: Convert to fraction form
    123,423.60/170,321.12 = 73,122.60/x
  3. Step 3: Cross multiply
    123,423.60x = 170,321.12 × 73,122.60
  4. Step 4: Simplify right side
    123,423.60x = 12,454,323,129.31
  5. Step 5: Solve for x
    x = 12,454,323,129.31/123,423.60
  6. Step 6: Final answer
    x = 100,907.15

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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.