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Finding the Fourth Proportional to 120,863.88, 181,602 and 76,511.52

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Solution

The fourth proportional to 120,863.88, 181,602 and 76,511.52 is: 114,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,863.88 : 181,602 = 76,511.52 : x
  2. Step 2: Convert to fraction form
    120,863.88/181,602 = 76,511.52/x
  3. Step 3: Cross multiply
    120,863.88x = 181,602 × 76,511.52
  4. Step 4: Simplify right side
    120,863.88x = 13,894,645,055.04
  5. Step 5: Solve for x
    x = 13,894,645,055.04/120,863.88
  6. Step 6: Final answer
    x = 114,961.10

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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.