Home / 287,584.76-431,378.25-87,904.37

Finding the Fourth Proportional to 287,584.76, 431,378.25 and 87,904.37

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Solution

The fourth proportional to 287,584.76, 431,378.25 and 87,904.37 is: 131,856.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,584.76 : 431,378.25 = 87,904.37 : x
  2. Step 2: Convert to fraction form
    287,584.76/431,378.25 = 87,904.37/x
  3. Step 3: Cross multiply
    287,584.76x = 431,378.25 × 87,904.37
  4. Step 4: Simplify right side
    287,584.76x = 37,920,033,297.95
  5. Step 5: Solve for x
    x = 37,920,033,297.95/287,584.76
  6. Step 6: Final answer
    x = 131,856.89

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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.