Home / 103,678.72-143,043.20-61,251.84

Finding the Fourth Proportional to 103,678.72, 143,043.20 and 61,251.84

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Solution

The fourth proportional to 103,678.72, 143,043.20 and 61,251.84 is: 84,507.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,678.72 : 143,043.20 = 61,251.84 : x
  2. Step 2: Convert to fraction form
    103,678.72/143,043.20 = 61,251.84/x
  3. Step 3: Cross multiply
    103,678.72x = 143,043.20 × 61,251.84
  4. Step 4: Simplify right side
    103,678.72x = 8,761,659,199.49
  5. Step 5: Solve for x
    x = 8,761,659,199.49/103,678.72
  6. Step 6: Final answer
    x = 84,507.79

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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.