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Finding the Fourth Proportional to 72,211.52, 108,317.12 and 19,628.64

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Solution

The fourth proportional to 72,211.52, 108,317.12 and 19,628.64 is: 29,442.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,211.52 : 108,317.12 = 19,628.64 : x
  2. Step 2: Convert to fraction form
    72,211.52/108,317.12 = 19,628.64/x
  3. Step 3: Cross multiply
    72,211.52x = 108,317.12 × 19,628.64
  4. Step 4: Simplify right side
    72,211.52x = 2,126,117,754.32
  5. Step 5: Solve for x
    x = 2,126,117,754.32/72,211.52
  6. Step 6: Final answer
    x = 29,442.92

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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.