Home / 74,128.78-111,204.02-21,531.43

Finding the Fourth Proportional to 74,128.78, 111,204.02 and 21,531.43

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Solution

The fourth proportional to 74,128.78, 111,204.02 and 21,531.43 is: 32,300.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,128.78 : 111,204.02 = 21,531.43 : x
  2. Step 2: Convert to fraction form
    74,128.78/111,204.02 = 21,531.43/x
  3. Step 3: Cross multiply
    74,128.78x = 111,204.02 × 21,531.43
  4. Step 4: Simplify right side
    74,128.78x = 2,394,381,572.35
  5. Step 5: Solve for x
    x = 2,394,381,572.35/74,128.78
  6. Step 6: Final answer
    x = 32,300.30

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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.