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Finding the Fourth Proportional to 48,870.70, 73,291.65 and 19,278.70

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Solution

The fourth proportional to 48,870.70, 73,291.65 and 19,278.70 is: 28,912.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,870.70 : 73,291.65 = 19,278.70 : x
  2. Step 2: Convert to fraction form
    48,870.70/73,291.65 = 19,278.70/x
  3. Step 3: Cross multiply
    48,870.70x = 73,291.65 × 19,278.70
  4. Step 4: Simplify right side
    48,870.70x = 1,412,967,732.86
  5. Step 5: Solve for x
    x = 1,412,967,732.86/48,870.70
  6. Step 6: Final answer
    x = 28,912.37

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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.