Home / 72,400.64-108,642.06-39,119.90

Finding the Fourth Proportional to 72,400.64, 108,642.06 and 39,119.90

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Solution

The fourth proportional to 72,400.64, 108,642.06 and 39,119.90 is: 58,702.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400.64 : 108,642.06 = 39,119.90 : x
  2. Step 2: Convert to fraction form
    72,400.64/108,642.06 = 39,119.90/x
  3. Step 3: Cross multiply
    72,400.64x = 108,642.06 × 39,119.90
  4. Step 4: Simplify right side
    72,400.64x = 4,250,065,979.78
  5. Step 5: Solve for x
    x = 4,250,065,979.78/72,400.64
  6. Step 6: Final answer
    x = 58,702.05

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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.