Home / 287,155.14-430,732.65-76,787.61

Finding the Fourth Proportional to 287,155.14, 430,732.65 and 76,787.61

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Solution

The fourth proportional to 287,155.14, 430,732.65 and 76,787.61 is: 115,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,155.14 : 430,732.65 = 76,787.61 : x
  2. Step 2: Convert to fraction form
    287,155.14/430,732.65 = 76,787.61/x
  3. Step 3: Cross multiply
    287,155.14x = 430,732.65 × 76,787.61
  4. Step 4: Simplify right side
    287,155.14x = 33,074,930,742.47
  5. Step 5: Solve for x
    x = 33,074,930,742.47/287,155.14
  6. Step 6: Final answer
    x = 115,181.40

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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.