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Finding the Fourth Proportional to 75,785.54, 113,515.39 and 61,489.78

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Solution

The fourth proportional to 75,785.54, 113,515.39 and 61,489.78 is: 92,102.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,785.54 : 113,515.39 = 61,489.78 : x
  2. Step 2: Convert to fraction form
    75,785.54/113,515.39 = 61,489.78/x
  3. Step 3: Cross multiply
    75,785.54x = 113,515.39 × 61,489.78
  4. Step 4: Simplify right side
    75,785.54x = 6,980,036,357.71
  5. Step 5: Solve for x
    x = 6,980,036,357.71/75,785.54
  6. Step 6: Final answer
    x = 92,102.48

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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.