Home / 79,986.32-120,038.88-30,115.52

Finding the Fourth Proportional to 79,986.32, 120,038.88 and 30,115.52

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Solution

The fourth proportional to 79,986.32, 120,038.88 and 30,115.52 is: 45,195.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,986.32 : 120,038.88 = 30,115.52 : x
  2. Step 2: Convert to fraction form
    79,986.32/120,038.88 = 30,115.52/x
  3. Step 3: Cross multiply
    79,986.32x = 120,038.88 × 30,115.52
  4. Step 4: Simplify right side
    79,986.32x = 3,615,033,291.42
  5. Step 5: Solve for x
    x = 3,615,033,291.42/79,986.32
  6. Step 6: Final answer
    x = 45,195.64

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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.