Home / 78,449.29-108,260.75-42,639.39

Finding the Fourth Proportional to 78,449.29, 108,260.75 and 42,639.39

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Solution

The fourth proportional to 78,449.29, 108,260.75 and 42,639.39 is: 58,842.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,449.29 : 108,260.75 = 42,639.39 : x
  2. Step 2: Convert to fraction form
    78,449.29/108,260.75 = 42,639.39/x
  3. Step 3: Cross multiply
    78,449.29x = 108,260.75 × 42,639.39
  4. Step 4: Simplify right side
    78,449.29x = 4,616,172,340.94
  5. Step 5: Solve for x
    x = 4,616,172,340.94/78,449.29
  6. Step 6: Final answer
    x = 58,842.75

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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.