Home / 84,742.22-127,072.92-31,397.60

Finding the Fourth Proportional to 84,742.22, 127,072.92 and 31,397.60

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Solution

The fourth proportional to 84,742.22, 127,072.92 and 31,397.60 is: 47,081.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,742.22 : 127,072.92 = 31,397.60 : x
  2. Step 2: Convert to fraction form
    84,742.22/127,072.92 = 31,397.60/x
  3. Step 3: Cross multiply
    84,742.22x = 127,072.92 × 31,397.60
  4. Step 4: Simplify right side
    84,742.22x = 3,989,784,712.99
  5. Step 5: Solve for x
    x = 3,989,784,712.99/84,742.22
  6. Step 6: Final answer
    x = 47,081.43

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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.