Home / 76,937.20-115,319.40-39,482.80

Finding the Fourth Proportional to 76,937.20, 115,319.40 and 39,482.80

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Solution

The fourth proportional to 76,937.20, 115,319.40 and 39,482.80 is: 59,179.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,937.20 : 115,319.40 = 39,482.80 : x
  2. Step 2: Convert to fraction form
    76,937.20/115,319.40 = 39,482.80/x
  3. Step 3: Cross multiply
    76,937.20x = 115,319.40 × 39,482.80
  4. Step 4: Simplify right side
    76,937.20x = 4,553,132,806.32
  5. Step 5: Solve for x
    x = 4,553,132,806.32/76,937.20
  6. Step 6: Final answer
    x = 59,179.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.