Home / 287,105.96-430,680.90-87,443.36

Finding the Fourth Proportional to 287,105.96, 430,680.90 and 87,443.36

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Solution

The fourth proportional to 287,105.96, 430,680.90 and 87,443.36 is: 131,171.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,105.96 : 430,680.90 = 87,443.36 : x
  2. Step 2: Convert to fraction form
    287,105.96/430,680.90 = 87,443.36/x
  3. Step 3: Cross multiply
    287,105.96x = 430,680.90 × 87,443.36
  4. Step 4: Simplify right side
    287,105.96x = 37,660,184,983.82
  5. Step 5: Solve for x
    x = 37,660,184,983.82/287,105.96
  6. Step 6: Final answer
    x = 131,171.73

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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.