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Finding the Fourth Proportional to 121,313.52, 181,748.61 and 87,950.88

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Solution

The fourth proportional to 121,313.52, 181,748.61 and 87,950.88 is: 131,765.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,313.52 : 181,748.61 = 87,950.88 : x
  2. Step 2: Convert to fraction form
    121,313.52/181,748.61 = 87,950.88/x
  3. Step 3: Cross multiply
    121,313.52x = 181,748.61 × 87,950.88
  4. Step 4: Simplify right side
    121,313.52x = 15,984,950,188.28
  5. Step 5: Solve for x
    x = 15,984,950,188.28/121,313.52
  6. Step 6: Final answer
    x = 131,765.61

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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.