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Finding the Fourth Proportional to 245,743.80, 368,615.70 and 87,915.30

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Solution

The fourth proportional to 245,743.80, 368,615.70 and 87,915.30 is: 131,872.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,743.80 : 368,615.70 = 87,915.30 : x
  2. Step 2: Convert to fraction form
    245,743.80/368,615.70 = 87,915.30/x
  3. Step 3: Cross multiply
    245,743.80x = 368,615.70 × 87,915.30
  4. Step 4: Simplify right side
    245,743.80x = 32,406,959,850.21
  5. Step 5: Solve for x
    x = 32,406,959,850.21/245,743.80
  6. Step 6: Final answer
    x = 131,872.95

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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.