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Finding the Fourth Proportional to 121,515.65, 167,624.20 and 71,204.93

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Solution

The fourth proportional to 121,515.65, 167,624.20 and 71,204.93 is: 98,223.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,515.65 : 167,624.20 = 71,204.93 : x
  2. Step 2: Convert to fraction form
    121,515.65/167,624.20 = 71,204.93/x
  3. Step 3: Cross multiply
    121,515.65x = 167,624.20 × 71,204.93
  4. Step 4: Simplify right side
    121,515.65x = 11,935,669,427.31
  5. Step 5: Solve for x
    x = 11,935,669,427.31/121,515.65
  6. Step 6: Final answer
    x = 98,223.31

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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.