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Finding the Fourth Proportional to 123,999.60, 185,999.40 and 74,233.20

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Solution

The fourth proportional to 123,999.60, 185,999.40 and 74,233.20 is: 111,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,999.60 : 185,999.40 = 74,233.20 : x
  2. Step 2: Convert to fraction form
    123,999.60/185,999.40 = 74,233.20/x
  3. Step 3: Cross multiply
    123,999.60x = 185,999.40 × 74,233.20
  4. Step 4: Simplify right side
    123,999.60x = 13,807,330,660.08
  5. Step 5: Solve for x
    x = 13,807,330,660.08/123,999.60
  6. Step 6: Final answer
    x = 111,349.80

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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.