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Finding the Fourth Proportional to 191,609.75, 287,537.65 and 128,501.13

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Solution

The fourth proportional to 191,609.75, 287,537.65 and 128,501.13 is: 192,834.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,609.75 : 287,537.65 = 128,501.13 : x
  2. Step 2: Convert to fraction form
    191,609.75/287,537.65 = 128,501.13/x
  3. Step 3: Cross multiply
    191,609.75x = 287,537.65 × 128,501.13
  4. Step 4: Simplify right side
    191,609.75x = 36,948,913,699.56
  5. Step 5: Solve for x
    x = 36,948,913,699.56/191,609.75
  6. Step 6: Final answer
    x = 192,834.20

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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.