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Finding the Fourth Proportional to 92,665.50, 138,999.47 and 30,336

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Solution

The fourth proportional to 92,665.50, 138,999.47 and 30,336 is: 45,504.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,665.50 : 138,999.47 = 30,336 : x
  2. Step 2: Convert to fraction form
    92,665.50/138,999.47 = 30,336/x
  3. Step 3: Cross multiply
    92,665.50x = 138,999.47 × 30,336
  4. Step 4: Simplify right side
    92,665.50x = 4,216,687,921.92
  5. Step 5: Solve for x
    x = 4,216,687,921.92/92,665.50
  6. Step 6: Final answer
    x = 45,504.40

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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.