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Finding the Fourth Proportional to 125,369.28, 187,765.92 and 105,393.60

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Solution

The fourth proportional to 125,369.28, 187,765.92 and 105,393.60 is: 157,848.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,369.28 : 187,765.92 = 105,393.60 : x
  2. Step 2: Convert to fraction form
    125,369.28/187,765.92 = 105,393.60/x
  3. Step 3: Cross multiply
    125,369.28x = 187,765.92 × 105,393.60
  4. Step 4: Simplify right side
    125,369.28x = 19,789,326,266.11
  5. Step 5: Solve for x
    x = 19,789,326,266.11/125,369.28
  6. Step 6: Final answer
    x = 157,848.29

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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.