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Finding the Fourth Proportional to 70,620.29, 105,946.73 and 20,704.23

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Solution

The fourth proportional to 70,620.29, 105,946.73 and 20,704.23 is: 31,061.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,620.29 : 105,946.73 = 20,704.23 : x
  2. Step 2: Convert to fraction form
    70,620.29/105,946.73 = 20,704.23/x
  3. Step 3: Cross multiply
    70,620.29x = 105,946.73 × 20,704.23
  4. Step 4: Simplify right side
    70,620.29x = 2,193,545,362.15
  5. Step 5: Solve for x
    x = 2,193,545,362.15/70,620.29
  6. Step 6: Final answer
    x = 31,061.12

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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.