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Finding the Fourth Proportional to 158,321.98, 218,472.96 and 86,690.44

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Solution

The fourth proportional to 158,321.98, 218,472.96 and 86,690.44 is: 119,626.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,321.98 : 218,472.96 = 86,690.44 : x
  2. Step 2: Convert to fraction form
    158,321.98/218,472.96 = 86,690.44/x
  3. Step 3: Cross multiply
    158,321.98x = 218,472.96 × 86,690.44
  4. Step 4: Simplify right side
    158,321.98x = 18,939,517,030.50
  5. Step 5: Solve for x
    x = 18,939,517,030.50/158,321.98
  6. Step 6: Final answer
    x = 119,626.58

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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.