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Finding the Fourth Proportional to 121,521.80, 167,700.52 and 67,809.08

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Solution

The fourth proportional to 121,521.80, 167,700.52 and 67,809.08 is: 93,576.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,521.80 : 167,700.52 = 67,809.08 : x
  2. Step 2: Convert to fraction form
    121,521.80/167,700.52 = 67,809.08/x
  3. Step 3: Cross multiply
    121,521.80x = 167,700.52 × 67,809.08
  4. Step 4: Simplify right side
    121,521.80x = 11,371,617,976.72
  5. Step 5: Solve for x
    x = 11,371,617,976.72/121,521.80
  6. Step 6: Final answer
    x = 93,576.77

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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.