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Finding the Fourth Proportional to 157,872.25, 217,863.71 and 90,804.25

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Solution

The fourth proportional to 157,872.25, 217,863.71 and 90,804.25 is: 125,309.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,872.25 : 217,863.71 = 90,804.25 : x
  2. Step 2: Convert to fraction form
    157,872.25/217,863.71 = 90,804.25/x
  3. Step 3: Cross multiply
    157,872.25x = 217,863.71 × 90,804.25
  4. Step 4: Simplify right side
    157,872.25x = 19,782,950,788.77
  5. Step 5: Solve for x
    x = 19,782,950,788.77/157,872.25
  6. Step 6: Final answer
    x = 125,309.87

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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.