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Finding the Fourth Proportional to 191,603.88, 287,110.17 and 121,335.57

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Solution

The fourth proportional to 191,603.88, 287,110.17 and 121,335.57 is: 181,816.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,603.88 : 287,110.17 = 121,335.57 : x
  2. Step 2: Convert to fraction form
    191,603.88/287,110.17 = 121,335.57/x
  3. Step 3: Cross multiply
    191,603.88x = 287,110.17 × 121,335.57
  4. Step 4: Simplify right side
    191,603.88x = 34,836,676,129.75
  5. Step 5: Solve for x
    x = 34,836,676,129.75/191,603.88
  6. Step 6: Final answer
    x = 181,816.13

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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.