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Finding the Fourth Proportional to 72,767.57, 100,419.10 and 40,936.49

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Solution

The fourth proportional to 72,767.57, 100,419.10 and 40,936.49 is: 56,492.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,767.57 : 100,419.10 = 40,936.49 : x
  2. Step 2: Convert to fraction form
    72,767.57/100,419.10 = 40,936.49/x
  3. Step 3: Cross multiply
    72,767.57x = 100,419.10 × 40,936.49
  4. Step 4: Simplify right side
    72,767.57x = 4,110,805,785.18
  5. Step 5: Solve for x
    x = 4,110,805,785.18/72,767.57
  6. Step 6: Final answer
    x = 56,492.28

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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.