Home / 84,212.72-126,282.12-31,585.30

Finding the Fourth Proportional to 84,212.72, 126,282.12 and 31,585.30

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Solution

The fourth proportional to 84,212.72, 126,282.12 and 31,585.30 is: 47,364.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,212.72 : 126,282.12 = 31,585.30 : x
  2. Step 2: Convert to fraction form
    84,212.72/126,282.12 = 31,585.30/x
  3. Step 3: Cross multiply
    84,212.72x = 126,282.12 × 31,585.30
  4. Step 4: Simplify right side
    84,212.72x = 3,988,658,644.84
  5. Step 5: Solve for x
    x = 3,988,658,644.84/84,212.72
  6. Step 6: Final answer
    x = 47,364.09

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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.