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Finding the Fourth Proportional to 80,215, 110,449.43 and 71,246.93

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Solution

The fourth proportional to 80,215, 110,449.43 and 71,246.93 is: 98,101.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,215 : 110,449.43 = 71,246.93 : x
  2. Step 2: Convert to fraction form
    80,215/110,449.43 = 71,246.93/x
  3. Step 3: Cross multiply
    80,215x = 110,449.43 × 71,246.93
  4. Step 4: Simplify right side
    80,215x = 7,869,182,807.75
  5. Step 5: Solve for x
    x = 7,869,182,807.75/80,215
  6. Step 6: Final answer
    x = 98,101.14

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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.