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Finding the Fourth Proportional to 71,486.76, 107,230.55 and 18,895.69

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Solution

The fourth proportional to 71,486.76, 107,230.55 and 18,895.69 is: 28,343.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,486.76 : 107,230.55 = 18,895.69 : x
  2. Step 2: Convert to fraction form
    71,486.76/107,230.55 = 18,895.69/x
  3. Step 3: Cross multiply
    71,486.76x = 107,230.55 × 18,895.69
  4. Step 4: Simplify right side
    71,486.76x = 2,026,194,868.77
  5. Step 5: Solve for x
    x = 2,026,194,868.77/71,486.76
  6. Step 6: Final answer
    x = 28,343.64

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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.