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Finding the Fourth Proportional to 121,480.53, 167,643.18 and 67,765.38

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Solution

The fourth proportional to 121,480.53, 167,643.18 and 67,765.38 is: 93,516.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,480.53 : 167,643.18 = 67,765.38 : x
  2. Step 2: Convert to fraction form
    121,480.53/167,643.18 = 67,765.38/x
  3. Step 3: Cross multiply
    121,480.53x = 167,643.18 × 67,765.38
  4. Step 4: Simplify right side
    121,480.53x = 11,360,403,797.11
  5. Step 5: Solve for x
    x = 11,360,403,797.11/121,480.53
  6. Step 6: Final answer
    x = 93,516.25

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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.