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Finding the Fourth Proportional to 65,878.64, 91,065.73 and 58,778.92

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Solution

The fourth proportional to 65,878.64, 91,065.73 and 58,778.92 is: 81,251.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,878.64 : 91,065.73 = 58,778.92 : x
  2. Step 2: Convert to fraction form
    65,878.64/91,065.73 = 58,778.92/x
  3. Step 3: Cross multiply
    65,878.64x = 91,065.73 × 58,778.92
  4. Step 4: Simplify right side
    65,878.64x = 5,352,744,883.80
  5. Step 5: Solve for x
    x = 5,352,744,883.80/65,878.64
  6. Step 6: Final answer
    x = 81,251.61

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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.