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Finding the Fourth Proportional to 48,640.62, 72,939.06 and 47,109.72

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Solution

The fourth proportional to 48,640.62, 72,939.06 and 47,109.72 is: 70,643.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,640.62 : 72,939.06 = 47,109.72 : x
  2. Step 2: Convert to fraction form
    48,640.62/72,939.06 = 47,109.72/x
  3. Step 3: Cross multiply
    48,640.62x = 72,939.06 × 47,109.72
  4. Step 4: Simplify right side
    48,640.62x = 3,436,138,693.66
  5. Step 5: Solve for x
    x = 3,436,138,693.66/48,640.62
  6. Step 6: Final answer
    x = 70,643.40

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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.