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Finding the Fourth Proportional to 86,375.74, 129,574.54 and 33,778.40

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Solution

The fourth proportional to 86,375.74, 129,574.54 and 33,778.40 is: 50,671.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,375.74 : 129,574.54 = 33,778.40 : x
  2. Step 2: Convert to fraction form
    86,375.74/129,574.54 = 33,778.40/x
  3. Step 3: Cross multiply
    86,375.74x = 129,574.54 × 33,778.40
  4. Step 4: Simplify right side
    86,375.74x = 4,376,820,641.94
  5. Step 5: Solve for x
    x = 4,376,820,641.94/86,375.74
  6. Step 6: Final answer
    x = 50,671.87

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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.