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Finding the Fourth Proportional to 123,166.25, 170,026.64 and 72,171.90

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Solution

The fourth proportional to 123,166.25, 170,026.64 and 72,171.90 is: 99,630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,166.25 : 170,026.64 = 72,171.90 : x
  2. Step 2: Convert to fraction form
    123,166.25/170,026.64 = 72,171.90/x
  3. Step 3: Cross multiply
    123,166.25x = 170,026.64 × 72,171.90
  4. Step 4: Simplify right side
    123,166.25x = 12,271,146,250.38
  5. Step 5: Solve for x
    x = 12,271,146,250.38/123,166.25
  6. Step 6: Final answer
    x = 99,630.75

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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.