Home / 81,421.32-122,132.16-39,839.16

Finding the Fourth Proportional to 81,421.32, 122,132.16 and 39,839.16

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Solution

The fourth proportional to 81,421.32, 122,132.16 and 39,839.16 is: 59,758.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.32 : 122,132.16 = 39,839.16 : x
  2. Step 2: Convert to fraction form
    81,421.32/122,132.16 = 39,839.16/x
  3. Step 3: Cross multiply
    81,421.32x = 122,132.16 × 39,839.16
  4. Step 4: Simplify right side
    81,421.32x = 4,865,642,663.39
  5. Step 5: Solve for x
    x = 4,865,642,663.39/81,421.32
  6. Step 6: Final answer
    x = 59,758.83

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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.