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Finding the Fourth Proportional to 121,581, 167,778.54 and 67,864.50

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Solution

The fourth proportional to 121,581, 167,778.54 and 67,864.50 is: 93,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,581 : 167,778.54 = 67,864.50 : x
  2. Step 2: Convert to fraction form
    121,581/167,778.54 = 67,864.50/x
  3. Step 3: Cross multiply
    121,581x = 167,778.54 × 67,864.50
  4. Step 4: Simplify right side
    121,581x = 11,386,206,727.83
  5. Step 5: Solve for x
    x = 11,386,206,727.83/121,581
  6. Step 6: Final answer
    x = 93,651.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.