Home / 261,867.74-392,817.20-81,986.85

Finding the Fourth Proportional to 261,867.74, 392,817.20 and 81,986.85

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Solution

The fourth proportional to 261,867.74, 392,817.20 and 81,986.85 is: 122,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,867.74 : 392,817.20 = 81,986.85 : x
  2. Step 2: Convert to fraction form
    261,867.74/392,817.20 = 81,986.85/x
  3. Step 3: Cross multiply
    261,867.74x = 392,817.20 × 81,986.85
  4. Step 4: Simplify right side
    261,867.74x = 32,205,844,443.89
  5. Step 5: Solve for x
    x = 32,205,844,443.89/261,867.74
  6. Step 6: Final answer
    x = 122,985.16

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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.