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Finding the Fourth Proportional to 71,458.98, 107,186.64 and 18,868.92

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Solution

The fourth proportional to 71,458.98, 107,186.64 and 18,868.92 is: 28,302.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,458.98 : 107,186.64 = 18,868.92 : x
  2. Step 2: Convert to fraction form
    71,458.98/107,186.64 = 18,868.92/x
  3. Step 3: Cross multiply
    71,458.98x = 107,186.64 × 18,868.92
  4. Step 4: Simplify right side
    71,458.98x = 2,022,496,135.23
  5. Step 5: Solve for x
    x = 2,022,496,135.23/71,458.98
  6. Step 6: Final answer
    x = 28,302.90

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1.5x scale

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.