Home / 78,589.32-108,453.14-42,779.22

Finding the Fourth Proportional to 78,589.32, 108,453.14 and 42,779.22

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Solution

The fourth proportional to 78,589.32, 108,453.14 and 42,779.22 is: 59,035.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.32 : 108,453.14 = 42,779.22 : x
  2. Step 2: Convert to fraction form
    78,589.32/108,453.14 = 42,779.22/x
  3. Step 3: Cross multiply
    78,589.32x = 108,453.14 × 42,779.22
  4. Step 4: Simplify right side
    78,589.32x = 4,639,540,735.75
  5. Step 5: Solve for x
    x = 4,639,540,735.75/78,589.32
  6. Step 6: Final answer
    x = 59,035.26

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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.