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Finding the Fourth Proportional to 157,680.64, 217,601.92 and 90,627.84

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Solution

The fourth proportional to 157,680.64, 217,601.92 and 90,627.84 is: 125,067.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,680.64 : 217,601.92 = 90,627.84 : x
  2. Step 2: Convert to fraction form
    157,680.64/217,601.92 = 90,627.84/x
  3. Step 3: Cross multiply
    157,680.64x = 217,601.92 × 90,627.84
  4. Step 4: Simplify right side
    157,680.64x = 19,720,791,989.45
  5. Step 5: Solve for x
    x = 19,720,791,989.45/157,680.64
  6. Step 6: Final answer
    x = 125,067.93

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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.