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Finding the Fourth Proportional to 71,776.24, 107,669.86 and 21,860.58

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Solution

The fourth proportional to 71,776.24, 107,669.86 and 21,860.58 is: 32,792.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,776.24 : 107,669.86 = 21,860.58 : x
  2. Step 2: Convert to fraction form
    71,776.24/107,669.86 = 21,860.58/x
  3. Step 3: Cross multiply
    71,776.24x = 107,669.86 × 21,860.58
  4. Step 4: Simplify right side
    71,776.24x = 2,353,725,588.12
  5. Step 5: Solve for x
    x = 2,353,725,588.12/71,776.24
  6. Step 6: Final answer
    x = 32,792.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.