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Finding the Fourth Proportional to 80,185.74, 120,279.12 and 21,020.89

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Solution

The fourth proportional to 80,185.74, 120,279.12 and 21,020.89 is: 31,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,185.74 : 120,279.12 = 21,020.89 : x
  2. Step 2: Convert to fraction form
    80,185.74/120,279.12 = 21,020.89/x
  3. Step 3: Cross multiply
    80,185.74x = 120,279.12 × 21,020.89
  4. Step 4: Simplify right side
    80,185.74x = 2,528,373,444.32
  5. Step 5: Solve for x
    x = 2,528,373,444.32/80,185.74
  6. Step 6: Final answer
    x = 31,531.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.