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Finding the Fourth Proportional to 72,487.46, 100,108.71 and 49,884.81

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Solution

The fourth proportional to 72,487.46, 100,108.71 and 49,884.81 is: 68,893.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,487.46 : 100,108.71 = 49,884.81 : x
  2. Step 2: Convert to fraction form
    72,487.46/100,108.71 = 49,884.81/x
  3. Step 3: Cross multiply
    72,487.46x = 100,108.71 × 49,884.81
  4. Step 4: Simplify right side
    72,487.46x = 4,993,904,165.40
  5. Step 5: Solve for x
    x = 4,993,904,165.40/72,487.46
  6. Step 6: Final answer
    x = 68,893.36

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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.