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Finding the Fourth Proportional to 62,990.82, 94,491.24 and 20,869.20

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Solution

The fourth proportional to 62,990.82, 94,491.24 and 20,869.20 is: 31,305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,990.82 : 94,491.24 = 20,869.20 : x
  2. Step 2: Convert to fraction form
    62,990.82/94,491.24 = 20,869.20/x
  3. Step 3: Cross multiply
    62,990.82x = 94,491.24 × 20,869.20
  4. Step 4: Simplify right side
    62,990.82x = 1,971,956,585.81
  5. Step 5: Solve for x
    x = 1,971,956,585.81/62,990.82
  6. Step 6: Final answer
    x = 31,305.46

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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.