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Finding the Fourth Proportional to 112,963.20, 169,639.20 and 73,694.40

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Solution

The fourth proportional to 112,963.20, 169,639.20 and 73,694.40 is: 110,668.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,963.20 : 169,639.20 = 73,694.40 : x
  2. Step 2: Convert to fraction form
    112,963.20/169,639.20 = 73,694.40/x
  3. Step 3: Cross multiply
    112,963.20x = 169,639.20 × 73,694.40
  4. Step 4: Simplify right side
    112,963.20x = 12,501,459,060.48
  5. Step 5: Solve for x
    x = 12,501,459,060.48/112,963.20
  6. Step 6: Final answer
    x = 110,668.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.