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Finding the Fourth Proportional to 121,460.92, 167,627.93 and 90,780.64

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Solution

The fourth proportional to 121,460.92, 167,627.93 and 90,780.64 is: 125,286.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,460.92 : 167,627.93 = 90,780.64 : x
  2. Step 2: Convert to fraction form
    121,460.92/167,627.93 = 90,780.64/x
  3. Step 3: Cross multiply
    121,460.92x = 167,627.93 × 90,780.64
  4. Step 4: Simplify right side
    121,460.92x = 15,217,369,894.30
  5. Step 5: Solve for x
    x = 15,217,369,894.30/121,460.92
  6. Step 6: Final answer
    x = 125,286.14

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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.