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Finding the Fourth Proportional to 72,358.88, 108,580.98 and 27,989.24

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Solution

The fourth proportional to 72,358.88, 108,580.98 and 27,989.24 is: 42,000.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,358.88 : 108,580.98 = 27,989.24 : x
  2. Step 2: Convert to fraction form
    72,358.88/108,580.98 = 27,989.24/x
  3. Step 3: Cross multiply
    72,358.88x = 108,580.98 × 27,989.24
  4. Step 4: Simplify right side
    72,358.88x = 3,039,099,108.66
  5. Step 5: Solve for x
    x = 3,039,099,108.66/72,358.88
  6. Step 6: Final answer
    x = 42,000.36

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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.