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Finding the Fourth Proportional to 158,357.97, 218,473.20 and 90,378.72

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Solution

The fourth proportional to 158,357.97, 218,473.20 and 90,378.72 is: 124,687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,357.97 : 218,473.20 = 90,378.72 : x
  2. Step 2: Convert to fraction form
    158,357.97/218,473.20 = 90,378.72/x
  3. Step 3: Cross multiply
    158,357.97x = 218,473.20 × 90,378.72
  4. Step 4: Simplify right side
    158,357.97x = 19,745,328,170.30
  5. Step 5: Solve for x
    x = 19,745,328,170.30/158,357.97
  6. Step 6: Final answer
    x = 124,687.93

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1.5x scale

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.