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Finding the Fourth Proportional to 158,658.58, 218,968.25 and 90,659.96

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Solution

The fourth proportional to 158,658.58, 218,968.25 and 90,659.96 is: 125,121.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,658.58 : 218,968.25 = 90,659.96 : x
  2. Step 2: Convert to fraction form
    158,658.58/218,968.25 = 90,659.96/x
  3. Step 3: Cross multiply
    158,658.58x = 218,968.25 × 90,659.96
  4. Step 4: Simplify right side
    158,658.58x = 19,851,652,059.26
  5. Step 5: Solve for x
    x = 19,851,652,059.26/158,658.58
  6. Step 6: Final answer
    x = 125,121.83

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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.