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Finding the Fourth Proportional to 48,455.52, 72,712.40 and 20,753.52

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Solution

The fourth proportional to 48,455.52, 72,712.40 and 20,753.52 is: 31,142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,455.52 : 72,712.40 = 20,753.52 : x
  2. Step 2: Convert to fraction form
    48,455.52/72,712.40 = 20,753.52/x
  3. Step 3: Cross multiply
    48,455.52x = 72,712.40 × 20,753.52
  4. Step 4: Simplify right side
    48,455.52x = 1,509,038,247.65
  5. Step 5: Solve for x
    x = 1,509,038,247.65/48,455.52
  6. Step 6: Final answer
    x = 31,142.75

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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.