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Finding the Fourth Proportional to 121,436.51, 167,562.51 and 67,720.14

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Solution

The fourth proportional to 121,436.51, 167,562.51 and 67,720.14 is: 93,442.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,436.51 : 167,562.51 = 67,720.14 : x
  2. Step 2: Convert to fraction form
    121,436.51/167,562.51 = 67,720.14/x
  3. Step 3: Cross multiply
    121,436.51x = 167,562.51 × 67,720.14
  4. Step 4: Simplify right side
    121,436.51x = 11,347,356,635.95
  5. Step 5: Solve for x
    x = 11,347,356,635.95/121,436.51
  6. Step 6: Final answer
    x = 93,442.71

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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.