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Finding the Fourth Proportional to 87,959.65, 121,384.24 and 47,673.43

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Solution

The fourth proportional to 87,959.65, 121,384.24 and 47,673.43 is: 65,789.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,959.65 : 121,384.24 = 47,673.43 : x
  2. Step 2: Convert to fraction form
    87,959.65/121,384.24 = 47,673.43/x
  3. Step 3: Cross multiply
    87,959.65x = 121,384.24 × 47,673.43
  4. Step 4: Simplify right side
    87,959.65x = 5,786,803,068.74
  5. Step 5: Solve for x
    x = 5,786,803,068.74/87,959.65
  6. Step 6: Final answer
    x = 65,789.29

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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.