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Finding the Fourth Proportional to 117,854.92, 162,636.67 and 64,138.79

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Solution

The fourth proportional to 117,854.92, 162,636.67 and 64,138.79 is: 88,509.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,854.92 : 162,636.67 = 64,138.79 : x
  2. Step 2: Convert to fraction form
    117,854.92/162,636.67 = 64,138.79/x
  3. Step 3: Cross multiply
    117,854.92x = 162,636.67 × 64,138.79
  4. Step 4: Simplify right side
    117,854.92x = 10,431,319,223.43
  5. Step 5: Solve for x
    x = 10,431,319,223.43/117,854.92
  6. Step 6: Final answer
    x = 88,509.83

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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.