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Finding the Fourth Proportional to 158,367.72, 218,535.60 and 90,382.80

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Solution

The fourth proportional to 158,367.72, 218,535.60 and 90,382.80 is: 124,721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,367.72 : 218,535.60 = 90,382.80 : x
  2. Step 2: Convert to fraction form
    158,367.72/218,535.60 = 90,382.80/x
  3. Step 3: Cross multiply
    158,367.72x = 218,535.60 × 90,382.80
  4. Step 4: Simplify right side
    158,367.72x = 19,751,859,427.68
  5. Step 5: Solve for x
    x = 19,751,859,427.68/158,367.72
  6. Step 6: Final answer
    x = 124,721.50

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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.