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Finding the Fourth Proportional to 72,936.10, 109,404.15 and 48,009.70

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Solution

The fourth proportional to 72,936.10, 109,404.15 and 48,009.70 is: 72,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,936.10 : 109,404.15 = 48,009.70 : x
  2. Step 2: Convert to fraction form
    72,936.10/109,404.15 = 48,009.70/x
  3. Step 3: Cross multiply
    72,936.10x = 109,404.15 × 48,009.70
  4. Step 4: Simplify right side
    72,936.10x = 5,252,460,420.26
  5. Step 5: Solve for x
    x = 5,252,460,420.26/72,936.10
  6. Step 6: Final answer
    x = 72,014.55

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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.