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Finding the Fourth Proportional to 136,354.16, 188,123.64 and 79,725.44

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Solution

The fourth proportional to 136,354.16, 188,123.64 and 79,725.44 is: 109,994.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,354.16 : 188,123.64 = 79,725.44 : x
  2. Step 2: Convert to fraction form
    136,354.16/188,123.64 = 79,725.44/x
  3. Step 3: Cross multiply
    136,354.16x = 188,123.64 × 79,725.44
  4. Step 4: Simplify right side
    136,354.16x = 14,998,239,973.40
  5. Step 5: Solve for x
    x = 14,998,239,973.40/136,354.16
  6. Step 6: Final answer
    x = 109,994.74

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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.