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Finding the Fourth Proportional to 121,866.48, 182,449.80 and 90,062.64

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Solution

The fourth proportional to 121,866.48, 182,449.80 and 90,062.64 is: 134,835.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,866.48 : 182,449.80 = 90,062.64 : x
  2. Step 2: Convert to fraction form
    121,866.48/182,449.80 = 90,062.64/x
  3. Step 3: Cross multiply
    121,866.48x = 182,449.80 × 90,062.64
  4. Step 4: Simplify right side
    121,866.48x = 16,431,910,655.47
  5. Step 5: Solve for x
    x = 16,431,910,655.47/121,866.48
  6. Step 6: Final answer
    x = 134,835.36

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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.