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Finding the Fourth Proportional to 45,513, 68,281.02 and 12,681

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Solution

The fourth proportional to 45,513, 68,281.02 and 12,681 is: 19,024.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,513 : 68,281.02 = 12,681 : x
  2. Step 2: Convert to fraction form
    45,513/68,281.02 = 12,681/x
  3. Step 3: Cross multiply
    45,513x = 68,281.02 × 12,681
  4. Step 4: Simplify right side
    45,513x = 865,871,614.62
  5. Step 5: Solve for x
    x = 865,871,614.62/45,513
  6. Step 6: Final answer
    x = 19,024.71

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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.