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Finding the Fourth Proportional to 100,551.70, 150,827.55 and 66,871.90

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Solution

The fourth proportional to 100,551.70, 150,827.55 and 66,871.90 is: 100,307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,551.70 : 150,827.55 = 66,871.90 : x
  2. Step 2: Convert to fraction form
    100,551.70/150,827.55 = 66,871.90/x
  3. Step 3: Cross multiply
    100,551.70x = 150,827.55 × 66,871.90
  4. Step 4: Simplify right side
    100,551.70x = 10,086,124,840.85
  5. Step 5: Solve for x
    x = 10,086,124,840.85/100,551.70
  6. Step 6: Final answer
    x = 100,307.85

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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.