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Finding the Fourth Proportional to 87,668.65, 120,953.16 and 49,916.17

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Solution

The fourth proportional to 87,668.65, 120,953.16 and 49,916.17 is: 68,867.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,668.65 : 120,953.16 = 49,916.17 : x
  2. Step 2: Convert to fraction form
    87,668.65/120,953.16 = 49,916.17/x
  3. Step 3: Cross multiply
    87,668.65x = 120,953.16 × 49,916.17
  4. Step 4: Simplify right side
    87,668.65x = 6,037,518,496.60
  5. Step 5: Solve for x
    x = 6,037,518,496.60/87,668.65
  6. Step 6: Final answer
    x = 68,867.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.