Home / 74,119.18-111,145.02-31,979.30

Finding the Fourth Proportional to 74,119.18, 111,145.02 and 31,979.30

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Solution

The fourth proportional to 74,119.18, 111,145.02 and 31,979.30 is: 47,954.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,119.18 : 111,145.02 = 31,979.30 : x
  2. Step 2: Convert to fraction form
    74,119.18/111,145.02 = 31,979.30/x
  3. Step 3: Cross multiply
    74,119.18x = 111,145.02 × 31,979.30
  4. Step 4: Simplify right side
    74,119.18x = 3,554,339,938.09
  5. Step 5: Solve for x
    x = 3,554,339,938.09/74,119.18
  6. Step 6: Final answer
    x = 47,954.39

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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.