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Finding the Fourth Proportional to 121,487.28, 167,647.08 and 89,644.56

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Solution

The fourth proportional to 121,487.28, 167,647.08 and 89,644.56 is: 123,705.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,487.28 : 167,647.08 = 89,644.56 : x
  2. Step 2: Convert to fraction form
    121,487.28/167,647.08 = 89,644.56/x
  3. Step 3: Cross multiply
    121,487.28x = 167,647.08 × 89,644.56
  4. Step 4: Simplify right side
    121,487.28x = 15,028,648,721.88
  5. Step 5: Solve for x
    x = 15,028,648,721.88/121,487.28
  6. Step 6: Final answer
    x = 123,705.53

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1.5x scale

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.