Home / 78,999.72-109,015.20-43,182.60

Finding the Fourth Proportional to 78,999.72, 109,015.20 and 43,182.60

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Solution

The fourth proportional to 78,999.72, 109,015.20 and 43,182.60 is: 59,589.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,999.72 : 109,015.20 = 43,182.60 : x
  2. Step 2: Convert to fraction form
    78,999.72/109,015.20 = 43,182.60/x
  3. Step 3: Cross multiply
    78,999.72x = 109,015.20 × 43,182.60
  4. Step 4: Simplify right side
    78,999.72x = 4,707,559,775.52
  5. Step 5: Solve for x
    x = 4,707,559,775.52/78,999.72
  6. Step 6: Final answer
    x = 59,589.58

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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.