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Finding the Fourth Proportional to 121,315.52, 181,751.61 and 87,952.88

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Solution

The fourth proportional to 121,315.52, 181,751.61 and 87,952.88 is: 131,768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,315.52 : 181,751.61 = 87,952.88 : x
  2. Step 2: Convert to fraction form
    121,315.52/181,751.61 = 87,952.88/x
  3. Step 3: Cross multiply
    121,315.52x = 181,751.61 × 87,952.88
  4. Step 4: Simplify right side
    121,315.52x = 15,985,577,544.14
  5. Step 5: Solve for x
    x = 15,985,577,544.14/121,315.52
  6. Step 6: Final answer
    x = 131,768.61

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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.