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Finding the Fourth Proportional to 71,800.68, 107,700.78 and 21,880.68

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Solution

The fourth proportional to 71,800.68, 107,700.78 and 21,880.68 is: 32,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.68 : 107,700.78 = 21,880.68 : x
  2. Step 2: Convert to fraction form
    71,800.68/107,700.78 = 21,880.68/x
  3. Step 3: Cross multiply
    71,800.68x = 107,700.78 × 21,880.68
  4. Step 4: Simplify right side
    71,800.68x = 2,356,566,302.93
  5. Step 5: Solve for x
    x = 2,356,566,302.93/71,800.68
  6. Step 6: Final answer
    x = 32,820.95

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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.