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Finding the Fourth Proportional to 68,289.72, 102,482.46 and 28,309.32

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Solution

The fourth proportional to 68,289.72, 102,482.46 and 28,309.32 is: 42,483.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,289.72 : 102,482.46 = 28,309.32 : x
  2. Step 2: Convert to fraction form
    68,289.72/102,482.46 = 28,309.32/x
  3. Step 3: Cross multiply
    68,289.72x = 102,482.46 × 28,309.32
  4. Step 4: Simplify right side
    68,289.72x = 2,901,208,754.53
  5. Step 5: Solve for x
    x = 2,901,208,754.53/68,289.72
  6. Step 6: Final answer
    x = 42,483.83

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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.