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Finding the Fourth Proportional to 77,691.60, 107,157.60 and 50,790.96

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Solution

The fourth proportional to 77,691.60, 107,157.60 and 50,790.96 is: 70,054.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,691.60 : 107,157.60 = 50,790.96 : x
  2. Step 2: Convert to fraction form
    77,691.60/107,157.60 = 50,790.96/x
  3. Step 3: Cross multiply
    77,691.60x = 107,157.60 × 50,790.96
  4. Step 4: Simplify right side
    77,691.60x = 5,442,637,375.30
  5. Step 5: Solve for x
    x = 5,442,637,375.30/77,691.60
  6. Step 6: Final answer
    x = 70,054.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.