Home / 81,144-111,974.40-45,335.52

Finding the Fourth Proportional to 81,144, 111,974.40 and 45,335.52

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Solution

The fourth proportional to 81,144, 111,974.40 and 45,335.52 is: 62,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144 : 111,974.40 = 45,335.52 : x
  2. Step 2: Convert to fraction form
    81,144/111,974.40 = 45,335.52/x
  3. Step 3: Cross multiply
    81,144x = 111,974.40 × 45,335.52
  4. Step 4: Simplify right side
    81,144x = 5,076,417,650.69
  5. Step 5: Solve for x
    x = 5,076,417,650.69/81,144
  6. Step 6: Final answer
    x = 62,560.60

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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.