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Finding the Fourth Proportional to 158,362.35, 218,485.80 and 90,330.18

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Solution

The fourth proportional to 158,362.35, 218,485.80 and 90,330.18 is: 124,624.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,362.35 : 218,485.80 = 90,330.18 : x
  2. Step 2: Convert to fraction form
    158,362.35/218,485.80 = 90,330.18/x
  3. Step 3: Cross multiply
    158,362.35x = 218,485.80 × 90,330.18
  4. Step 4: Simplify right side
    158,362.35x = 19,735,861,641.44
  5. Step 5: Solve for x
    x = 19,735,861,641.44/158,362.35
  6. Step 6: Final answer
    x = 124,624.71

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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.