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Finding the Fourth Proportional to 45,807.80, 68,721.51 and 14,217.20

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Solution

The fourth proportional to 45,807.80, 68,721.51 and 14,217.20 is: 21,328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,807.80 : 68,721.51 = 14,217.20 : x
  2. Step 2: Convert to fraction form
    45,807.80/68,721.51 = 14,217.20/x
  3. Step 3: Cross multiply
    45,807.80x = 68,721.51 × 14,217.20
  4. Step 4: Simplify right side
    45,807.80x = 977,027,451.97
  5. Step 5: Solve for x
    x = 977,027,451.97/45,807.80
  6. Step 6: Final answer
    x = 21,328.84

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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.