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Finding the Fourth Proportional to 74,672, 103,047.36 and 41,138.72

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Solution

The fourth proportional to 74,672, 103,047.36 and 41,138.72 is: 56,771.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,672 : 103,047.36 = 41,138.72 : x
  2. Step 2: Convert to fraction form
    74,672/103,047.36 = 41,138.72/x
  3. Step 3: Cross multiply
    74,672x = 103,047.36 × 41,138.72
  4. Step 4: Simplify right side
    74,672x = 4,239,236,489.78
  5. Step 5: Solve for x
    x = 4,239,236,489.78/74,672
  6. Step 6: Final answer
    x = 56,771.43

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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.