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Finding the Fourth Proportional to 90,450, 124,821 and 52,716.96

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Solution

The fourth proportional to 90,450, 124,821 and 52,716.96 is: 72,749.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,450 : 124,821 = 52,716.96 : x
  2. Step 2: Convert to fraction form
    90,450/124,821 = 52,716.96/x
  3. Step 3: Cross multiply
    90,450x = 124,821 × 52,716.96
  4. Step 4: Simplify right side
    90,450x = 6,580,183,664.16
  5. Step 5: Solve for x
    x = 6,580,183,664.16/90,450
  6. Step 6: Final answer
    x = 72,749.40

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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.