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Finding the Fourth Proportional to 204,987.79, 307,576.59 and 78,585.76

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Solution

The fourth proportional to 204,987.79, 307,576.59 and 78,585.76 is: 117,915.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,987.79 : 307,576.59 = 78,585.76 : x
  2. Step 2: Convert to fraction form
    204,987.79/307,576.59 = 78,585.76/x
  3. Step 3: Cross multiply
    204,987.79x = 307,576.59 × 78,585.76
  4. Step 4: Simplify right side
    204,987.79x = 24,171,138,152.55
  5. Step 5: Solve for x
    x = 24,171,138,152.55/204,987.79
  6. Step 6: Final answer
    x = 117,915.02

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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.