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Finding the Fourth Proportional to 72,752.78, 100,397.81 and 40,921.67

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Solution

The fourth proportional to 72,752.78, 100,397.81 and 40,921.67 is: 56,471.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,752.78 : 100,397.81 = 40,921.67 : x
  2. Step 2: Convert to fraction form
    72,752.78/100,397.81 = 40,921.67/x
  3. Step 3: Cross multiply
    72,752.78x = 100,397.81 × 40,921.67
  4. Step 4: Simplify right side
    72,752.78x = 4,108,446,402.84
  5. Step 5: Solve for x
    x = 4,108,446,402.84/72,752.78
  6. Step 6: Final answer
    x = 56,471.33

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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.