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Finding the Fourth Proportional to 118,366.87, 163,345.31 and 64,651.92

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Solution

The fourth proportional to 118,366.87, 163,345.31 and 64,651.92 is: 89,219.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,366.87 : 163,345.31 = 64,651.92 : x
  2. Step 2: Convert to fraction form
    118,366.87/163,345.31 = 64,651.92/x
  3. Step 3: Cross multiply
    118,366.87x = 163,345.31 × 64,651.92
  4. Step 4: Simplify right side
    118,366.87x = 10,560,588,139.95
  5. Step 5: Solve for x
    x = 10,560,588,139.95/118,366.87
  6. Step 6: Final answer
    x = 89,219.12

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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.