Home / 158,278.08-218,441.40-90,311.88

Finding the Fourth Proportional to 158,278.08, 218,441.40 and 90,311.88

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Solution

The fourth proportional to 158,278.08, 218,441.40 and 90,311.88 is: 124,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,278.08 : 218,441.40 = 90,311.88 : x
  2. Step 2: Convert to fraction form
    158,278.08/218,441.40 = 90,311.88/x
  3. Step 3: Cross multiply
    158,278.08x = 218,441.40 × 90,311.88
  4. Step 4: Simplify right side
    158,278.08x = 19,727,853,503.83
  5. Step 5: Solve for x
    x = 19,727,853,503.83/158,278.08
  6. Step 6: Final answer
    x = 124,640.47

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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.