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Finding the Fourth Proportional to 72,311, 108,454.26 and 19,708.16

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Solution

The fourth proportional to 72,311, 108,454.26 and 19,708.16 is: 29,558.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,311 : 108,454.26 = 19,708.16 : x
  2. Step 2: Convert to fraction form
    72,311/108,454.26 = 19,708.16/x
  3. Step 3: Cross multiply
    72,311x = 108,454.26 × 19,708.16
  4. Step 4: Simplify right side
    72,311x = 2,137,433,908.76
  5. Step 5: Solve for x
    x = 2,137,433,908.76/72,311
  6. Step 6: Final answer
    x = 29,558.90

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1.5x scale

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.