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Finding the Fourth Proportional to 71,878.68, 107,686.62 and 52,108.20

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Solution

The fourth proportional to 71,878.68, 107,686.62 and 52,108.20 is: 78,067.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,878.68 : 107,686.62 = 52,108.20 : x
  2. Step 2: Convert to fraction form
    71,878.68/107,686.62 = 52,108.20/x
  3. Step 3: Cross multiply
    71,878.68x = 107,686.62 × 52,108.20
  4. Step 4: Simplify right side
    71,878.68x = 5,611,355,932.28
  5. Step 5: Solve for x
    x = 5,611,355,932.28/71,878.68
  6. Step 6: Final answer
    x = 78,067.04

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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.