Home / 121,720.30-167,945.20-70,702.72

Finding the Fourth Proportional to 121,720.30, 167,945.20 and 70,702.72

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Solution

The fourth proportional to 121,720.30, 167,945.20 and 70,702.72 is: 97,553.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,720.30 : 167,945.20 = 70,702.72 : x
  2. Step 2: Convert to fraction form
    121,720.30/167,945.20 = 70,702.72/x
  3. Step 3: Cross multiply
    121,720.30x = 167,945.20 × 70,702.72
  4. Step 4: Simplify right side
    121,720.30x = 11,874,182,450.94
  5. Step 5: Solve for x
    x = 11,874,182,450.94/121,720.30
  6. Step 6: Final answer
    x = 97,553.02

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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.