Home / 285,468.25-428,185.91-85,784.35

Finding the Fourth Proportional to 285,468.25, 428,185.91 and 85,784.35

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Solution

The fourth proportional to 285,468.25, 428,185.91 and 85,784.35 is: 128,671.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,468.25 : 428,185.91 = 85,784.35 : x
  2. Step 2: Convert to fraction form
    285,468.25/428,185.91 = 85,784.35/x
  3. Step 3: Cross multiply
    285,468.25x = 428,185.91 × 85,784.35
  4. Step 4: Simplify right side
    285,468.25x = 36,731,649,539.59
  5. Step 5: Solve for x
    x = 36,731,649,539.59/285,468.25
  6. Step 6: Final answer
    x = 128,671.58

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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.