Home / 90,884.28-136,316.70-31,721.10

Finding the Fourth Proportional to 90,884.28, 136,316.70 and 31,721.10

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Solution

The fourth proportional to 90,884.28, 136,316.70 and 31,721.10 is: 47,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,884.28 : 136,316.70 = 31,721.10 : x
  2. Step 2: Convert to fraction form
    90,884.28/136,316.70 = 31,721.10/x
  3. Step 3: Cross multiply
    90,884.28x = 136,316.70 × 31,721.10
  4. Step 4: Simplify right side
    90,884.28x = 4,324,115,672.37
  5. Step 5: Solve for x
    x = 4,324,115,672.37/90,884.28
  6. Step 6: Final answer
    x = 47,578.26

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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.