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Finding the Fourth Proportional to 49,436, 74,154.40 and 12,500

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Solution

The fourth proportional to 49,436, 74,154.40 and 12,500 is: 18,750.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,436 : 74,154.40 = 12,500 : x
  2. Step 2: Convert to fraction form
    49,436/74,154.40 = 12,500/x
  3. Step 3: Cross multiply
    49,436x = 74,154.40 × 12,500
  4. Step 4: Simplify right side
    49,436x = 926,930,000.00
  5. Step 5: Solve for x
    x = 926,930,000.00/49,436
  6. Step 6: Final answer
    x = 18,750.10

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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.