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Finding the Fourth Proportional to 117,880.78, 162,679.12 and 64,169.40

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Solution

The fourth proportional to 117,880.78, 162,679.12 and 64,169.40 is: 88,555.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,880.78 : 162,679.12 = 64,169.40 : x
  2. Step 2: Convert to fraction form
    117,880.78/162,679.12 = 64,169.40/x
  3. Step 3: Cross multiply
    117,880.78x = 162,679.12 × 64,169.40
  4. Step 4: Simplify right side
    117,880.78x = 10,439,021,522.93
  5. Step 5: Solve for x
    x = 10,439,021,522.93/117,880.78
  6. Step 6: Final answer
    x = 88,555.76

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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.