Home / 286,770.18-430,067.85-76,380.78

Finding the Fourth Proportional to 286,770.18, 430,067.85 and 76,380.78

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Solution

The fourth proportional to 286,770.18, 430,067.85 and 76,380.78 is: 114,547.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,770.18 : 430,067.85 = 76,380.78 : x
  2. Step 2: Convert to fraction form
    286,770.18/430,067.85 = 76,380.78/x
  3. Step 3: Cross multiply
    286,770.18x = 430,067.85 × 76,380.78
  4. Step 4: Simplify right side
    286,770.18x = 32,848,917,835.92
  5. Step 5: Solve for x
    x = 32,848,917,835.92/286,770.18
  6. Step 6: Final answer
    x = 114,547.89

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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.