Home / 76,760.16-115,142.40-21,356.16

Finding the Fourth Proportional to 76,760.16, 115,142.40 and 21,356.16

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Solution

The fourth proportional to 76,760.16, 115,142.40 and 21,356.16 is: 32,034.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,760.16 : 115,142.40 = 21,356.16 : x
  2. Step 2: Convert to fraction form
    76,760.16/115,142.40 = 21,356.16/x
  3. Step 3: Cross multiply
    76,760.16x = 115,142.40 × 21,356.16
  4. Step 4: Simplify right side
    76,760.16x = 2,458,999,517.18
  5. Step 5: Solve for x
    x = 2,458,999,517.18/76,760.16
  6. Step 6: Final answer
    x = 32,034.84

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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.