Home / 71,939.57-99,272.95-39,679.80

Finding the Fourth Proportional to 71,939.57, 99,272.95 and 39,679.80

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Solution

The fourth proportional to 71,939.57, 99,272.95 and 39,679.80 is: 54,756.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,939.57 : 99,272.95 = 39,679.80 : x
  2. Step 2: Convert to fraction form
    71,939.57/99,272.95 = 39,679.80/x
  3. Step 3: Cross multiply
    71,939.57x = 99,272.95 × 39,679.80
  4. Step 4: Simplify right side
    71,939.57x = 3,939,130,801.41
  5. Step 5: Solve for x
    x = 3,939,130,801.41/71,939.57
  6. Step 6: Final answer
    x = 54,756.11

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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.