Home / 142,757.58-196,997.45-78,214.65

Finding the Fourth Proportional to 142,757.58, 196,997.45 and 78,214.65

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Solution

The fourth proportional to 142,757.58, 196,997.45 and 78,214.65 is: 107,931.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,757.58 : 196,997.45 = 78,214.65 : x
  2. Step 2: Convert to fraction form
    142,757.58/196,997.45 = 78,214.65/x
  3. Step 3: Cross multiply
    142,757.58x = 196,997.45 × 78,214.65
  4. Step 4: Simplify right side
    142,757.58x = 15,408,086,602.64
  5. Step 5: Solve for x
    x = 15,408,086,602.64/142,757.58
  6. Step 6: Final answer
    x = 107,931.83

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1.5x scale

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.