Home / 76,815.30-115,295.85-47,290.80

Finding the Fourth Proportional to 76,815.30, 115,295.85 and 47,290.80

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Solution

The fourth proportional to 76,815.30, 115,295.85 and 47,290.80 is: 70,981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,815.30 : 115,295.85 = 47,290.80 : x
  2. Step 2: Convert to fraction form
    76,815.30/115,295.85 = 47,290.80/x
  3. Step 3: Cross multiply
    76,815.30x = 115,295.85 × 47,290.80
  4. Step 4: Simplify right side
    76,815.30x = 5,452,432,983.18
  5. Step 5: Solve for x
    x = 5,452,432,983.18/76,815.30
  6. Step 6: Final answer
    x = 70,981.08

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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.