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Finding the Fourth Proportional to 158,306.80, 218,488.08 and 90,323.68

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Solution

The fourth proportional to 158,306.80, 218,488.08 and 90,323.68 is: 124,660.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,306.80 : 218,488.08 = 90,323.68 : x
  2. Step 2: Convert to fraction form
    158,306.80/218,488.08 = 90,323.68/x
  3. Step 3: Cross multiply
    158,306.80x = 218,488.08 × 90,323.68
  4. Step 4: Simplify right side
    158,306.80x = 19,734,647,421.73
  5. Step 5: Solve for x
    x = 19,734,647,421.73/158,306.80
  6. Step 6: Final answer
    x = 124,660.77

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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.