Home / 121,438.31-167,527.67-78,981.35

Finding the Fourth Proportional to 121,438.31, 167,527.67 and 78,981.35

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Solution

The fourth proportional to 121,438.31, 167,527.67 and 78,981.35 is: 108,957.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,438.31 : 167,527.67 = 78,981.35 : x
  2. Step 2: Convert to fraction form
    121,438.31/167,527.67 = 78,981.35/x
  3. Step 3: Cross multiply
    121,438.31x = 167,527.67 × 78,981.35
  4. Step 4: Simplify right side
    121,438.31x = 13,231,560,306.41
  5. Step 5: Solve for x
    x = 13,231,560,306.41/121,438.31
  6. Step 6: Final answer
    x = 108,957.06

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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.