Home / 65,847.15-90,870.35-38,979.86

Finding the Fourth Proportional to 65,847.15, 90,870.35 and 38,979.86

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Solution

The fourth proportional to 65,847.15, 90,870.35 and 38,979.86 is: 53,792.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,847.15 : 90,870.35 = 38,979.86 : x
  2. Step 2: Convert to fraction form
    65,847.15/90,870.35 = 38,979.86/x
  3. Step 3: Cross multiply
    65,847.15x = 90,870.35 × 38,979.86
  4. Step 4: Simplify right side
    65,847.15x = 3,542,112,871.90
  5. Step 5: Solve for x
    x = 3,542,112,871.90/65,847.15
  6. Step 6: Final answer
    x = 53,792.96

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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.