Home / 78,589.52-108,454.92-42,780.56

Finding the Fourth Proportional to 78,589.52, 108,454.92 and 42,780.56

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Solution

The fourth proportional to 78,589.52, 108,454.92 and 42,780.56 is: 59,037.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.52 : 108,454.92 = 42,780.56 : x
  2. Step 2: Convert to fraction form
    78,589.52/108,454.92 = 42,780.56/x
  3. Step 3: Cross multiply
    78,589.52x = 108,454.92 × 42,780.56
  4. Step 4: Simplify right side
    78,589.52x = 4,639,762,212.36
  5. Step 5: Solve for x
    x = 4,639,762,212.36/78,589.52
  6. Step 6: Final answer
    x = 59,037.93

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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.