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Finding the Fourth Proportional to 158,694.10, 218,983.71 and 90,697.58

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Solution

The fourth proportional to 158,694.10, 218,983.71 and 90,697.58 is: 125,154.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,694.10 : 218,983.71 = 90,697.58 : x
  2. Step 2: Convert to fraction form
    158,694.10/218,983.71 = 90,697.58/x
  3. Step 3: Cross multiply
    158,694.10x = 218,983.71 × 90,697.58
  4. Step 4: Simplify right side
    158,694.10x = 19,861,292,556.42
  5. Step 5: Solve for x
    x = 19,861,292,556.42/158,694.10
  6. Step 6: Final answer
    x = 125,154.57

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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.