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Finding the Fourth Proportional to 154,615.68, 213,411.68 and 90,974

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Solution

The fourth proportional to 154,615.68, 213,411.68 and 90,974 is: 125,568.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,615.68 : 213,411.68 = 90,974 : x
  2. Step 2: Convert to fraction form
    154,615.68/213,411.68 = 90,974/x
  3. Step 3: Cross multiply
    154,615.68x = 213,411.68 × 90,974
  4. Step 4: Simplify right side
    154,615.68x = 19,414,914,176.32
  5. Step 5: Solve for x
    x = 19,414,914,176.32/154,615.68
  6. Step 6: Final answer
    x = 125,568.86

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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.