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Finding the Fourth Proportional to 121,202.74, 167,259.36 and 67,488.40

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Solution

The fourth proportional to 121,202.74, 167,259.36 and 67,488.40 is: 93,133.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,202.74 : 167,259.36 = 67,488.40 : x
  2. Step 2: Convert to fraction form
    121,202.74/167,259.36 = 67,488.40/x
  3. Step 3: Cross multiply
    121,202.74x = 167,259.36 × 67,488.40
  4. Step 4: Simplify right side
    121,202.74x = 11,288,066,591.42
  5. Step 5: Solve for x
    x = 11,288,066,591.42/121,202.74
  6. Step 6: Final answer
    x = 93,133.76

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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.