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Finding the Fourth Proportional to 158,288.40, 218,458.80 and 90,289.80

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Solution

The fourth proportional to 158,288.40, 218,458.80 and 90,289.80 is: 124,611.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,288.40 : 218,458.80 = 90,289.80 : x
  2. Step 2: Convert to fraction form
    158,288.40/218,458.80 = 90,289.80/x
  3. Step 3: Cross multiply
    158,288.40x = 218,458.80 × 90,289.80
  4. Step 4: Simplify right side
    158,288.40x = 19,724,601,360.24
  5. Step 5: Solve for x
    x = 19,724,601,360.24/158,288.40
  6. Step 6: Final answer
    x = 124,611.79

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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.