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Finding the Fourth Proportional to 112,347.20, 168,520.80 and 105,786.20

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Solution

The fourth proportional to 112,347.20, 168,520.80 and 105,786.20 is: 158,679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,347.20 : 168,520.80 = 105,786.20 : x
  2. Step 2: Convert to fraction form
    112,347.20/168,520.80 = 105,786.20/x
  3. Step 3: Cross multiply
    112,347.20x = 168,520.80 × 105,786.20
  4. Step 4: Simplify right side
    112,347.20x = 17,827,175,052.96
  5. Step 5: Solve for x
    x = 17,827,175,052.96/112,347.20
  6. Step 6: Final answer
    x = 158,679.30

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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.