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Finding the Fourth Proportional to 157,694, 217,626.60 and 90,630.32

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Solution

The fourth proportional to 157,694, 217,626.60 and 90,630.32 is: 125,074.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,694 : 217,626.60 = 90,630.32 : x
  2. Step 2: Convert to fraction form
    157,694/217,626.60 = 90,630.32/x
  3. Step 3: Cross multiply
    157,694x = 217,626.60 × 90,630.32
  4. Step 4: Simplify right side
    157,694x = 19,723,568,398.51
  5. Step 5: Solve for x
    x = 19,723,568,398.51/157,694
  6. Step 6: Final answer
    x = 125,074.95

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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.