Home / 78,449.20-108,259.92-42,639.22

Finding the Fourth Proportional to 78,449.20, 108,259.92 and 42,639.22

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Solution

The fourth proportional to 78,449.20, 108,259.92 and 42,639.22 is: 58,842.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,449.20 : 108,259.92 = 42,639.22 : x
  2. Step 2: Convert to fraction form
    78,449.20/108,259.92 = 42,639.22/x
  3. Step 3: Cross multiply
    78,449.20x = 108,259.92 × 42,639.22
  4. Step 4: Simplify right side
    78,449.20x = 4,616,118,546.06
  5. Step 5: Solve for x
    x = 4,616,118,546.06/78,449.20
  6. Step 6: Final answer
    x = 58,842.14

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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.