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Finding the Fourth Proportional to 68,271.24, 102,420.72 and 28,828.20

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Solution

The fourth proportional to 68,271.24, 102,420.72 and 28,828.20 is: 43,248.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,271.24 : 102,420.72 = 28,828.20 : x
  2. Step 2: Convert to fraction form
    68,271.24/102,420.72 = 28,828.20/x
  3. Step 3: Cross multiply
    68,271.24x = 102,420.72 × 28,828.20
  4. Step 4: Simplify right side
    68,271.24x = 2,952,605,000.30
  5. Step 5: Solve for x
    x = 2,952,605,000.30/68,271.24
  6. Step 6: Final answer
    x = 43,248.15

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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.