Home / 78,637.21-117,839.15-57,758.65

Finding the Fourth Proportional to 78,637.21, 117,839.15 and 57,758.65

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Solution

The fourth proportional to 78,637.21, 117,839.15 and 57,758.65 is: 86,552.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,637.21 : 117,839.15 = 57,758.65 : x
  2. Step 2: Convert to fraction form
    78,637.21/117,839.15 = 57,758.65/x
  3. Step 3: Cross multiply
    78,637.21x = 117,839.15 × 57,758.65
  4. Step 4: Simplify right side
    78,637.21x = 6,806,230,842.09
  5. Step 5: Solve for x
    x = 6,806,230,842.09/78,637.21
  6. Step 6: Final answer
    x = 86,552.29

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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.