Home / 78,809.20-108,757.04-42,999.95

Finding the Fourth Proportional to 78,809.20, 108,757.04 and 42,999.95

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Solution

The fourth proportional to 78,809.20, 108,757.04 and 42,999.95 is: 59,340.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.20 : 108,757.04 = 42,999.95 : x
  2. Step 2: Convert to fraction form
    78,809.20/108,757.04 = 42,999.95/x
  3. Step 3: Cross multiply
    78,809.20x = 108,757.04 × 42,999.95
  4. Step 4: Simplify right side
    78,809.20x = 4,676,547,339.04
  5. Step 5: Solve for x
    x = 4,676,547,339.04/78,809.20
  6. Step 6: Final answer
    x = 59,340.12

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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.