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Finding the Fourth Proportional to 87,891.98, 121,257.45 and 64,976.82

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Solution

The fourth proportional to 87,891.98, 121,257.45 and 64,976.82 is: 89,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,891.98 : 121,257.45 = 64,976.82 : x
  2. Step 2: Convert to fraction form
    87,891.98/121,257.45 = 64,976.82/x
  3. Step 3: Cross multiply
    87,891.98x = 121,257.45 × 64,976.82
  4. Step 4: Simplify right side
    87,891.98x = 7,878,923,502.31
  5. Step 5: Solve for x
    x = 7,878,923,502.31/87,891.98
  6. Step 6: Final answer
    x = 89,643.26

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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.