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Finding the Fourth Proportional to 72,763.92, 100,414.08 and 40,498.38

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Solution

The fourth proportional to 72,763.92, 100,414.08 and 40,498.38 is: 55,887.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.92 : 100,414.08 = 40,498.38 : x
  2. Step 2: Convert to fraction form
    72,763.92/100,414.08 = 40,498.38/x
  3. Step 3: Cross multiply
    72,763.92x = 100,414.08 × 40,498.38
  4. Step 4: Simplify right side
    72,763.92x = 4,066,607,569.19
  5. Step 5: Solve for x
    x = 4,066,607,569.19/72,763.92
  6. Step 6: Final answer
    x = 55,887.69

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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.