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Finding the Fourth Proportional to 87,995.76, 121,434.54 and 47,709.48

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Solution

The fourth proportional to 87,995.76, 121,434.54 and 47,709.48 is: 65,839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,995.76 : 121,434.54 = 47,709.48 : x
  2. Step 2: Convert to fraction form
    87,995.76/121,434.54 = 47,709.48/x
  3. Step 3: Cross multiply
    87,995.76x = 121,434.54 × 47,709.48
  4. Step 4: Simplify right side
    87,995.76x = 5,793,578,757.44
  5. Step 5: Solve for x
    x = 5,793,578,757.44/87,995.76
  6. Step 6: Final answer
    x = 65,839.29

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1.5x scale

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.