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Finding the Fourth Proportional to 121,001.81, 181,253.03 and 70,929.86

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Solution

The fourth proportional to 121,001.81, 181,253.03 and 70,929.86 is: 106,248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,001.81 : 181,253.03 = 70,929.86 : x
  2. Step 2: Convert to fraction form
    121,001.81/181,253.03 = 70,929.86/x
  3. Step 3: Cross multiply
    121,001.81x = 181,253.03 × 70,929.86
  4. Step 4: Simplify right side
    121,001.81x = 12,856,250,781.56
  5. Step 5: Solve for x
    x = 12,856,250,781.56/121,001.81
  6. Step 6: Final answer
    x = 106,248.42

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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.