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Finding the Fourth Proportional to 112,712.40, 168,946.56 and 73,297.80

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Solution

The fourth proportional to 112,712.40, 168,946.56 and 73,297.80 is: 109,867.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,712.40 : 168,946.56 = 73,297.80 : x
  2. Step 2: Convert to fraction form
    112,712.40/168,946.56 = 73,297.80/x
  3. Step 3: Cross multiply
    112,712.40x = 168,946.56 × 73,297.80
  4. Step 4: Simplify right side
    112,712.40x = 12,383,411,165.57
  5. Step 5: Solve for x
    x = 12,383,411,165.57/112,712.40
  6. Step 6: Final answer
    x = 109,867.34

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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.