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Finding the Fourth Proportional to 125,143.96, 187,731.60 and 40,912.60

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Solution

The fourth proportional to 125,143.96, 187,731.60 and 40,912.60 is: 61,374.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,143.96 : 187,731.60 = 40,912.60 : x
  2. Step 2: Convert to fraction form
    125,143.96/187,731.60 = 40,912.60/x
  3. Step 3: Cross multiply
    125,143.96x = 187,731.60 × 40,912.60
  4. Step 4: Simplify right side
    125,143.96x = 7,680,587,858.16
  5. Step 5: Solve for x
    x = 7,680,587,858.16/125,143.96
  6. Step 6: Final answer
    x = 61,374.02

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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.