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Finding the Fourth Proportional to 121,483.26, 167,641.56 and 89,640.54

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Solution

The fourth proportional to 121,483.26, 167,641.56 and 89,640.54 is: 123,700.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,483.26 : 167,641.56 = 89,640.54 : x
  2. Step 2: Convert to fraction form
    121,483.26/167,641.56 = 89,640.54/x
  3. Step 3: Cross multiply
    121,483.26x = 167,641.56 × 89,640.54
  4. Step 4: Simplify right side
    121,483.26x = 15,027,479,964.84
  5. Step 5: Solve for x
    x = 15,027,479,964.84/121,483.26
  6. Step 6: Final answer
    x = 123,700.01

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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.