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Finding the Fourth Proportional to 87,859.77, 121,215.11 and 53,855.97

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Solution

The fourth proportional to 87,859.77, 121,215.11 and 53,855.97 is: 74,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,859.77 : 121,215.11 = 53,855.97 : x
  2. Step 2: Convert to fraction form
    87,859.77/121,215.11 = 53,855.97/x
  3. Step 3: Cross multiply
    87,859.77x = 121,215.11 × 53,855.97
  4. Step 4: Simplify right side
    87,859.77x = 6,528,157,327.71
  5. Step 5: Solve for x
    x = 6,528,157,327.71/87,859.77
  6. Step 6: Final answer
    x = 74,302.01

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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.