Home / 84,282.30-126,381.12-28,102.52

Finding the Fourth Proportional to 84,282.30, 126,381.12 and 28,102.52

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Solution

The fourth proportional to 84,282.30, 126,381.12 and 28,102.52 is: 42,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,282.30 : 126,381.12 = 28,102.52 : x
  2. Step 2: Convert to fraction form
    84,282.30/126,381.12 = 28,102.52/x
  3. Step 3: Cross multiply
    84,282.30x = 126,381.12 × 28,102.52
  4. Step 4: Simplify right side
    84,282.30x = 3,551,627,636.47
  5. Step 5: Solve for x
    x = 3,551,627,636.47/84,282.30
  6. Step 6: Final answer
    x = 42,139.66

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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.