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Finding the Fourth Proportional to 48,300.40, 72,463.20 and 18,719.20

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Solution

The fourth proportional to 48,300.40, 72,463.20 and 18,719.20 is: 28,083.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,300.40 : 72,463.20 = 18,719.20 : x
  2. Step 2: Convert to fraction form
    48,300.40/72,463.20 = 18,719.20/x
  3. Step 3: Cross multiply
    48,300.40x = 72,463.20 × 18,719.20
  4. Step 4: Simplify right side
    48,300.40x = 1,356,453,133.44
  5. Step 5: Solve for x
    x = 1,356,453,133.44/48,300.40
  6. Step 6: Final answer
    x = 28,083.68

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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.