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Finding the Fourth Proportional to 123,549.20, 185,323.80 and 81,485.90

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Solution

The fourth proportional to 123,549.20, 185,323.80 and 81,485.90 is: 122,228.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,549.20 : 185,323.80 = 81,485.90 : x
  2. Step 2: Convert to fraction form
    123,549.20/185,323.80 = 81,485.90/x
  3. Step 3: Cross multiply
    123,549.20x = 185,323.80 × 81,485.90
  4. Step 4: Simplify right side
    123,549.20x = 15,101,276,634.42
  5. Step 5: Solve for x
    x = 15,101,276,634.42/123,549.20
  6. Step 6: Final answer
    x = 122,228.85

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1.5x scale

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.