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Finding the Fourth Proportional to 158,359.38, 218,539.50 and 90,375

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Solution

The fourth proportional to 158,359.38, 218,539.50 and 90,375 is: 124,719.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,359.38 : 218,539.50 = 90,375 : x
  2. Step 2: Convert to fraction form
    158,359.38/218,539.50 = 90,375/x
  3. Step 3: Cross multiply
    158,359.38x = 218,539.50 × 90,375
  4. Step 4: Simplify right side
    158,359.38x = 19,750,507,312.50
  5. Step 5: Solve for x
    x = 19,750,507,312.50/158,359.38
  6. Step 6: Final answer
    x = 124,719.53

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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.