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Finding the Fourth Proportional to 158,605.90, 218,819.37 and 90,573.82

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Solution

The fourth proportional to 158,605.90, 218,819.37 and 90,573.82 is: 124,959.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,605.90 : 218,819.37 = 90,573.82 : x
  2. Step 2: Convert to fraction form
    158,605.90/218,819.37 = 90,573.82/x
  3. Step 3: Cross multiply
    158,605.90x = 218,819.37 × 90,573.82
  4. Step 4: Simplify right side
    158,605.90x = 19,819,306,230.89
  5. Step 5: Solve for x
    x = 19,819,306,230.89/158,605.90
  6. Step 6: Final answer
    x = 124,959.45

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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.