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Finding the Fourth Proportional to 67,892.45, 101,838.47 and 21,145.32

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Solution

The fourth proportional to 67,892.45, 101,838.47 and 21,145.32 is: 31,717.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,892.45 : 101,838.47 = 21,145.32 : x
  2. Step 2: Convert to fraction form
    67,892.45/101,838.47 = 21,145.32/x
  3. Step 3: Cross multiply
    67,892.45x = 101,838.47 × 21,145.32
  4. Step 4: Simplify right side
    67,892.45x = 2,153,406,930.73
  5. Step 5: Solve for x
    x = 2,153,406,930.73/67,892.45
  6. Step 6: Final answer
    x = 31,717.92

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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.