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Finding the Fourth Proportional to 121,148.76, 181,859.46 and 51,087

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Solution

The fourth proportional to 121,148.76, 181,859.46 and 51,087 is: 76,687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,148.76 : 181,859.46 = 51,087 : x
  2. Step 2: Convert to fraction form
    121,148.76/181,859.46 = 51,087/x
  3. Step 3: Cross multiply
    121,148.76x = 181,859.46 × 51,087
  4. Step 4: Simplify right side
    121,148.76x = 9,290,654,233.02
  5. Step 5: Solve for x
    x = 9,290,654,233.02/121,148.76
  6. Step 6: Final answer
    x = 76,687.98

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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.