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Finding the Fourth Proportional to 121,774.16, 167,939.15 and 101,423.78

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Solution

The fourth proportional to 121,774.16, 167,939.15 and 101,423.78 is: 139,873.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,774.16 : 167,939.15 = 101,423.78 : x
  2. Step 2: Convert to fraction form
    121,774.16/167,939.15 = 101,423.78/x
  3. Step 3: Cross multiply
    121,774.16x = 167,939.15 × 101,423.78
  4. Step 4: Simplify right side
    121,774.16x = 17,033,023,315.72
  5. Step 5: Solve for x
    x = 17,033,023,315.72/121,774.16
  6. Step 6: Final answer
    x = 139,873.88

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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.