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Finding the Fourth Proportional to 121,367.79, 167,559.31 and 107,901.78

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Solution

The fourth proportional to 121,367.79, 167,559.31 and 107,901.78 is: 148,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,367.79 : 167,559.31 = 107,901.78 : x
  2. Step 2: Convert to fraction form
    121,367.79/167,559.31 = 107,901.78/x
  3. Step 3: Cross multiply
    121,367.79x = 167,559.31 × 107,901.78
  4. Step 4: Simplify right side
    121,367.79x = 18,079,948,012.64
  5. Step 5: Solve for x
    x = 18,079,948,012.64/121,367.79
  6. Step 6: Final answer
    x = 148,968.25

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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.