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Finding the Fourth Proportional to 72,911.38, 100,615.80 and 41,078.38

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Solution

The fourth proportional to 72,911.38, 100,615.80 and 41,078.38 is: 56,687.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911.38 : 100,615.80 = 41,078.38 : x
  2. Step 2: Convert to fraction form
    72,911.38/100,615.80 = 41,078.38/x
  3. Step 3: Cross multiply
    72,911.38x = 100,615.80 × 41,078.38
  4. Step 4: Simplify right side
    72,911.38x = 4,133,134,066.40
  5. Step 5: Solve for x
    x = 4,133,134,066.40/72,911.38
  6. Step 6: Final answer
    x = 56,687.09

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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.