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Finding the Fourth Proportional to 191,877.15, 287,813.03 and 86,695.95

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Solution

The fourth proportional to 191,877.15, 287,813.03 and 86,695.95 is: 130,042.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,877.15 : 287,813.03 = 86,695.95 : x
  2. Step 2: Convert to fraction form
    191,877.15/287,813.03 = 86,695.95/x
  3. Step 3: Cross multiply
    191,877.15x = 287,813.03 × 86,695.95
  4. Step 4: Simplify right side
    191,877.15x = 24,952,223,624.75
  5. Step 5: Solve for x
    x = 24,952,223,624.75/191,877.15
  6. Step 6: Final answer
    x = 130,042.71

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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.