Home / 135,701.78-187,264.02-81,977.42

Finding the Fourth Proportional to 135,701.78, 187,264.02 and 81,977.42

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Solution

The fourth proportional to 135,701.78, 187,264.02 and 81,977.42 is: 113,126.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,701.78 : 187,264.02 = 81,977.42 : x
  2. Step 2: Convert to fraction form
    135,701.78/187,264.02 = 81,977.42/x
  3. Step 3: Cross multiply
    135,701.78x = 187,264.02 × 81,977.42
  4. Step 4: Simplify right side
    135,701.78x = 15,351,421,218.43
  5. Step 5: Solve for x
    x = 15,351,421,218.43/135,701.78
  6. Step 6: Final answer
    x = 113,126.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.