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Finding the Fourth Proportional to 48,308, 72,468.48 and 20,612.48

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Solution

The fourth proportional to 48,308, 72,468.48 and 20,612.48 is: 30,921.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,308 : 72,468.48 = 20,612.48 : x
  2. Step 2: Convert to fraction form
    48,308/72,468.48 = 20,612.48/x
  3. Step 3: Cross multiply
    48,308x = 72,468.48 × 20,612.48
  4. Step 4: Simplify right side
    48,308x = 1,493,755,094.63
  5. Step 5: Solve for x
    x = 1,493,755,094.63/48,308
  6. Step 6: Final answer
    x = 30,921.48

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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.