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Finding the Fourth Proportional to 209,961.60, 314,944.80 and 52,190.40

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Solution

The fourth proportional to 209,961.60, 314,944.80 and 52,190.40 is: 78,286.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,961.60 : 314,944.80 = 52,190.40 : x
  2. Step 2: Convert to fraction form
    209,961.60/314,944.80 = 52,190.40/x
  3. Step 3: Cross multiply
    209,961.60x = 314,944.80 × 52,190.40
  4. Step 4: Simplify right side
    209,961.60x = 16,437,095,089.92
  5. Step 5: Solve for x
    x = 16,437,095,089.92/209,961.60
  6. Step 6: Final answer
    x = 78,286.20

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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.