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Finding the Fourth Proportional to 121,874.56, 182,603.20 and 66,509.44

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Solution

The fourth proportional to 121,874.56, 182,603.20 and 66,509.44 is: 99,650.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,874.56 : 182,603.20 = 66,509.44 : x
  2. Step 2: Convert to fraction form
    121,874.56/182,603.20 = 66,509.44/x
  3. Step 3: Cross multiply
    121,874.56x = 182,603.20 × 66,509.44
  4. Step 4: Simplify right side
    121,874.56x = 12,144,836,574.21
  5. Step 5: Solve for x
    x = 12,144,836,574.21/121,874.56
  6. Step 6: Final answer
    x = 99,650.30

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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.