Home / 287,118.41-430,644.78-76,772.75

Finding the Fourth Proportional to 287,118.41, 430,644.78 and 76,772.75

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Solution

The fourth proportional to 287,118.41, 430,644.78 and 76,772.75 is: 115,150.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,118.41 : 430,644.78 = 76,772.75 : x
  2. Step 2: Convert to fraction form
    287,118.41/430,644.78 = 76,772.75/x
  3. Step 3: Cross multiply
    287,118.41x = 430,644.78 × 76,772.75
  4. Step 4: Simplify right side
    287,118.41x = 33,061,784,033.75
  5. Step 5: Solve for x
    x = 33,061,784,033.75/287,118.41
  6. Step 6: Final answer
    x = 115,150.35

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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.