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Finding the Fourth Proportional to 131,012.67, 180,787.55 and 73,642.87

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Solution

The fourth proportional to 131,012.67, 180,787.55 and 73,642.87 is: 101,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,012.67 : 180,787.55 = 73,642.87 : x
  2. Step 2: Convert to fraction form
    131,012.67/180,787.55 = 73,642.87/x
  3. Step 3: Cross multiply
    131,012.67x = 180,787.55 × 73,642.87
  4. Step 4: Simplify right side
    131,012.67x = 13,313,713,900.04
  5. Step 5: Solve for x
    x = 13,313,713,900.04/131,012.67
  6. Step 6: Final answer
    x = 101,621.57

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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.