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Finding the Fourth Proportional to 191,640.88, 287,479.07 and 65,238.65

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Solution

The fourth proportional to 191,640.88, 287,479.07 and 65,238.65 is: 97,864.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,640.88 : 287,479.07 = 65,238.65 : x
  2. Step 2: Convert to fraction form
    191,640.88/287,479.07 = 65,238.65/x
  3. Step 3: Cross multiply
    191,640.88x = 287,479.07 × 65,238.65
  4. Step 4: Simplify right side
    191,640.88x = 18,754,746,430.06
  5. Step 5: Solve for x
    x = 18,754,746,430.06/191,640.88
  6. Step 6: Final answer
    x = 97,864.02

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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.