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Finding the Fourth Proportional to 125,116.19, 187,203.44 and 87,749.20

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Solution

The fourth proportional to 125,116.19, 187,203.44 and 87,749.20 is: 131,293.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,116.19 : 187,203.44 = 87,749.20 : x
  2. Step 2: Convert to fraction form
    125,116.19/187,203.44 = 87,749.20/x
  3. Step 3: Cross multiply
    125,116.19x = 187,203.44 × 87,749.20
  4. Step 4: Simplify right side
    125,116.19x = 16,426,951,658.50
  5. Step 5: Solve for x
    x = 16,426,951,658.50/125,116.19
  6. Step 6: Final answer
    x = 131,293.57

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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.