Home / 78,720.04-108,631.49-42,910.75

Finding the Fourth Proportional to 78,720.04, 108,631.49 and 42,910.75

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Solution

The fourth proportional to 78,720.04, 108,631.49 and 42,910.75 is: 59,215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720.04 : 108,631.49 = 42,910.75 : x
  2. Step 2: Convert to fraction form
    78,720.04/108,631.49 = 42,910.75/x
  3. Step 3: Cross multiply
    78,720.04x = 108,631.49 × 42,910.75
  4. Step 4: Simplify right side
    78,720.04x = 4,661,458,709.52
  5. Step 5: Solve for x
    x = 4,661,458,709.52/78,720.04
  6. Step 6: Final answer
    x = 59,215.65

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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.