Home / 81,060.72-111,915.12-55,609.68

Finding the Fourth Proportional to 81,060.72, 111,915.12 and 55,609.68

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Solution

The fourth proportional to 81,060.72, 111,915.12 and 55,609.68 is: 76,776.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,060.72 : 111,915.12 = 55,609.68 : x
  2. Step 2: Convert to fraction form
    81,060.72/111,915.12 = 55,609.68/x
  3. Step 3: Cross multiply
    81,060.72x = 111,915.12 × 55,609.68
  4. Step 4: Simplify right side
    81,060.72x = 6,223,564,010.36
  5. Step 5: Solve for x
    x = 6,223,564,010.36/81,060.72
  6. Step 6: Final answer
    x = 76,776.57

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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.