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Finding the Fourth Proportional to 88,690.60, 133,035.90 and 72,944.20

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Solution

The fourth proportional to 88,690.60, 133,035.90 and 72,944.20 is: 109,416.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,690.60 : 133,035.90 = 72,944.20 : x
  2. Step 2: Convert to fraction form
    88,690.60/133,035.90 = 72,944.20/x
  3. Step 3: Cross multiply
    88,690.60x = 133,035.90 × 72,944.20
  4. Step 4: Simplify right side
    88,690.60x = 9,704,197,296.78
  5. Step 5: Solve for x
    x = 9,704,197,296.78/88,690.60
  6. Step 6: Final answer
    x = 109,416.30

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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.