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Finding the Fourth Proportional to 136,712.46, 188,667.72 and 79,347.48

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Solution

The fourth proportional to 136,712.46, 188,667.72 and 79,347.48 is: 109,502.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,712.46 : 188,667.72 = 79,347.48 : x
  2. Step 2: Convert to fraction form
    136,712.46/188,667.72 = 79,347.48/x
  3. Step 3: Cross multiply
    136,712.46x = 188,667.72 × 79,347.48
  4. Step 4: Simplify right side
    136,712.46x = 14,970,308,139.35
  5. Step 5: Solve for x
    x = 14,970,308,139.35/136,712.46
  6. Step 6: Final answer
    x = 109,502.15

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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.