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Finding the Fourth Proportional to 67,985.64, 101,992.86 and 21,242.04

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Solution

The fourth proportional to 67,985.64, 101,992.86 and 21,242.04 is: 31,867.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985.64 : 101,992.86 = 21,242.04 : x
  2. Step 2: Convert to fraction form
    67,985.64/101,992.86 = 21,242.04/x
  3. Step 3: Cross multiply
    67,985.64x = 101,992.86 × 21,242.04
  4. Step 4: Simplify right side
    67,985.64x = 2,166,536,411.83
  5. Step 5: Solve for x
    x = 2,166,536,411.83/67,985.64
  6. Step 6: Final answer
    x = 31,867.56

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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.