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Finding the Fourth Proportional to 121,388.88, 167,600.16 and 76,085.04

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Solution

The fourth proportional to 121,388.88, 167,600.16 and 76,085.04 is: 105,049.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,388.88 : 167,600.16 = 76,085.04 : x
  2. Step 2: Convert to fraction form
    121,388.88/167,600.16 = 76,085.04/x
  3. Step 3: Cross multiply
    121,388.88x = 167,600.16 × 76,085.04
  4. Step 4: Simplify right side
    121,388.88x = 12,751,864,877.61
  5. Step 5: Solve for x
    x = 12,751,864,877.61/121,388.88
  6. Step 6: Final answer
    x = 105,049.70

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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.