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Finding the Fourth Proportional to 270,652.10, 405,978.15 and 70,972.10

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Solution

The fourth proportional to 270,652.10, 405,978.15 and 70,972.10 is: 106,458.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,652.10 : 405,978.15 = 70,972.10 : x
  2. Step 2: Convert to fraction form
    270,652.10/405,978.15 = 70,972.10/x
  3. Step 3: Cross multiply
    270,652.10x = 405,978.15 × 70,972.10
  4. Step 4: Simplify right side
    270,652.10x = 28,813,121,859.62
  5. Step 5: Solve for x
    x = 28,813,121,859.62/270,652.10
  6. Step 6: Final answer
    x = 106,458.15

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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.