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Finding the Fourth Proportional to 158,235.64, 218,359.75 and 90,274.61

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Solution

The fourth proportional to 158,235.64, 218,359.75 and 90,274.61 is: 124,575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,235.64 : 218,359.75 = 90,274.61 : x
  2. Step 2: Convert to fraction form
    158,235.64/218,359.75 = 90,274.61/x
  3. Step 3: Cross multiply
    158,235.64x = 218,359.75 × 90,274.61
  4. Step 4: Simplify right side
    158,235.64x = 19,712,340,819.57
  5. Step 5: Solve for x
    x = 19,712,340,819.57/158,235.64
  6. Step 6: Final answer
    x = 124,575.86

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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.