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Finding the Fourth Proportional to 71,994.30, 107,991.45 and 66,308.10

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Solution

The fourth proportional to 71,994.30, 107,991.45 and 66,308.10 is: 99,462.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994.30 : 107,991.45 = 66,308.10 : x
  2. Step 2: Convert to fraction form
    71,994.30/107,991.45 = 66,308.10/x
  3. Step 3: Cross multiply
    71,994.30x = 107,991.45 × 66,308.10
  4. Step 4: Simplify right side
    71,994.30x = 7,160,707,865.75
  5. Step 5: Solve for x
    x = 7,160,707,865.75/71,994.30
  6. Step 6: Final answer
    x = 99,462.15

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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.