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Finding the Fourth Proportional to 48,990.87, 73,484.69 and 21,288.87

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Solution

The fourth proportional to 48,990.87, 73,484.69 and 21,288.87 is: 31,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,990.87 : 73,484.69 = 21,288.87 : x
  2. Step 2: Convert to fraction form
    48,990.87/73,484.69 = 21,288.87/x
  3. Step 3: Cross multiply
    48,990.87x = 73,484.69 × 21,288.87
  4. Step 4: Simplify right side
    48,990.87x = 1,564,405,905.96
  5. Step 5: Solve for x
    x = 1,564,405,905.96/48,990.87
  6. Step 6: Final answer
    x = 31,932.60

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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.