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Finding the Fourth Proportional to 74,036, 102,171.12 and 40,502.72

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Solution

The fourth proportional to 74,036, 102,171.12 and 40,502.72 is: 55,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,036 : 102,171.12 = 40,502.72 : x
  2. Step 2: Convert to fraction form
    74,036/102,171.12 = 40,502.72/x
  3. Step 3: Cross multiply
    74,036x = 102,171.12 × 40,502.72
  4. Step 4: Simplify right side
    74,036x = 4,138,208,265.45
  5. Step 5: Solve for x
    x = 4,138,208,265.45/74,036
  6. Step 6: Final answer
    x = 55,894.54

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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.