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Finding the Fourth Proportional to 158,362.53, 218,543.84 and 90,378.15

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Solution

The fourth proportional to 158,362.53, 218,543.84 and 90,378.15 is: 124,723.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,362.53 : 218,543.84 = 90,378.15 : x
  2. Step 2: Convert to fraction form
    158,362.53/218,543.84 = 90,378.15/x
  3. Step 3: Cross multiply
    158,362.53x = 218,543.84 × 90,378.15
  4. Step 4: Simplify right side
    158,362.53x = 19,751,587,020.58
  5. Step 5: Solve for x
    x = 19,751,587,020.58/158,362.53
  6. Step 6: Final answer
    x = 124,723.87

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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.