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Finding the Fourth Proportional to 158,614.80, 218,868.12 and 90,636.09

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Solution

The fourth proportional to 158,614.80, 218,868.12 and 90,636.09 is: 125,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,614.80 : 218,868.12 = 90,636.09 : x
  2. Step 2: Convert to fraction form
    158,614.80/218,868.12 = 90,636.09/x
  3. Step 3: Cross multiply
    158,614.80x = 218,868.12 × 90,636.09
  4. Step 4: Simplify right side
    158,614.80x = 19,837,350,622.45
  5. Step 5: Solve for x
    x = 19,837,350,622.45/158,614.80
  6. Step 6: Final answer
    x = 125,066.20

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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.