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Finding the Fourth Proportional to 79,253.16, 109,372.74 and 47,415.90

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Solution

The fourth proportional to 79,253.16, 109,372.74 and 47,415.90 is: 65,435.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,253.16 : 109,372.74 = 47,415.90 : x
  2. Step 2: Convert to fraction form
    79,253.16/109,372.74 = 47,415.90/x
  3. Step 3: Cross multiply
    79,253.16x = 109,372.74 × 47,415.90
  4. Step 4: Simplify right side
    79,253.16x = 5,186,006,902.57
  5. Step 5: Solve for x
    x = 5,186,006,902.57/79,253.16
  6. Step 6: Final answer
    x = 65,435.96

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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.