Home / 76,879.02-115,309.95-20,724.72

Finding the Fourth Proportional to 76,879.02, 115,309.95 and 20,724.72

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Solution

The fourth proportional to 76,879.02, 115,309.95 and 20,724.72 is: 31,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,879.02 : 115,309.95 = 20,724.72 : x
  2. Step 2: Convert to fraction form
    76,879.02/115,309.95 = 20,724.72/x
  3. Step 3: Cross multiply
    76,879.02x = 115,309.95 × 20,724.72
  4. Step 4: Simplify right side
    76,879.02x = 2,389,766,426.96
  5. Step 5: Solve for x
    x = 2,389,766,426.96/76,879.02
  6. Step 6: Final answer
    x = 31,084.77

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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.