Home / 79,077.12-109,128-47,246.04

Finding the Fourth Proportional to 79,077.12, 109,128 and 47,246.04

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Solution

The fourth proportional to 79,077.12, 109,128 and 47,246.04 is: 65,200.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,077.12 : 109,128 = 47,246.04 : x
  2. Step 2: Convert to fraction form
    79,077.12/109,128 = 47,246.04/x
  3. Step 3: Cross multiply
    79,077.12x = 109,128 × 47,246.04
  4. Step 4: Simplify right side
    79,077.12x = 5,155,865,853.12
  5. Step 5: Solve for x
    x = 5,155,865,853.12/79,077.12
  6. Step 6: Final answer
    x = 65,200.48

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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.