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Finding the Fourth Proportional to 48,285, 66,618.63 and 30,397.86

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Solution

The fourth proportional to 48,285, 66,618.63 and 30,397.86 is: 41,939.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,285 : 66,618.63 = 30,397.86 : x
  2. Step 2: Convert to fraction form
    48,285/66,618.63 = 30,397.86/x
  3. Step 3: Cross multiply
    48,285x = 66,618.63 × 30,397.86
  4. Step 4: Simplify right side
    48,285x = 2,025,063,788.13
  5. Step 5: Solve for x
    x = 2,025,063,788.13/48,285
  6. Step 6: Final answer
    x = 41,939.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.