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Finding the Fourth Proportional to 72,501.73, 108,731.72 and 19,912.93

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Solution

The fourth proportional to 72,501.73, 108,731.72 and 19,912.93 is: 29,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,501.73 : 108,731.72 = 19,912.93 : x
  2. Step 2: Convert to fraction form
    72,501.73/108,731.72 = 19,912.93/x
  3. Step 3: Cross multiply
    72,501.73x = 108,731.72 × 19,912.93
  4. Step 4: Simplify right side
    72,501.73x = 2,165,167,029.57
  5. Step 5: Solve for x
    x = 2,165,167,029.57/72,501.73
  6. Step 6: Final answer
    x = 29,863.66

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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.