Home / 80,685.78-111,269.96-51,623.35

Finding the Fourth Proportional to 80,685.78, 111,269.96 and 51,623.35

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Solution

The fourth proportional to 80,685.78, 111,269.96 and 51,623.35 is: 71,191.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,685.78 : 111,269.96 = 51,623.35 : x
  2. Step 2: Convert to fraction form
    80,685.78/111,269.96 = 51,623.35/x
  3. Step 3: Cross multiply
    80,685.78x = 111,269.96 × 51,623.35
  4. Step 4: Simplify right side
    80,685.78x = 5,744,127,818.13
  5. Step 5: Solve for x
    x = 5,744,127,818.13/80,685.78
  6. Step 6: Final answer
    x = 71,191.32

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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.