Home / 287,143.27-430,776.45-87,479.75

Finding the Fourth Proportional to 287,143.27, 430,776.45 and 87,479.75

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Solution

The fourth proportional to 287,143.27, 430,776.45 and 87,479.75 is: 131,238.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,143.27 : 430,776.45 = 87,479.75 : x
  2. Step 2: Convert to fraction form
    287,143.27/430,776.45 = 87,479.75/x
  3. Step 3: Cross multiply
    287,143.27x = 430,776.45 × 87,479.75
  4. Step 4: Simplify right side
    287,143.27x = 37,684,217,228.83
  5. Step 5: Solve for x
    x = 37,684,217,228.83/287,143.27
  6. Step 6: Final answer
    x = 131,238.38

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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.