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Finding the Fourth Proportional to 70,660.16, 105,990.84 and 20,741.08

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Solution

The fourth proportional to 70,660.16, 105,990.84 and 20,741.08 is: 31,111.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,660.16 : 105,990.84 = 20,741.08 : x
  2. Step 2: Convert to fraction form
    70,660.16/105,990.84 = 20,741.08/x
  3. Step 3: Cross multiply
    70,660.16x = 105,990.84 × 20,741.08
  4. Step 4: Simplify right side
    70,660.16x = 2,198,364,491.71
  5. Step 5: Solve for x
    x = 2,198,364,491.71/70,660.16
  6. Step 6: Final answer
    x = 31,111.80

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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.