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Finding the Fourth Proportional to 72,043.07, 108,070.07 and 19,451.79

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Solution

The fourth proportional to 72,043.07, 108,070.07 and 19,451.79 is: 29,179.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,043.07 : 108,070.07 = 19,451.79 : x
  2. Step 2: Convert to fraction form
    72,043.07/108,070.07 = 19,451.79/x
  3. Step 3: Cross multiply
    72,043.07x = 108,070.07 × 19,451.79
  4. Step 4: Simplify right side
    72,043.07x = 2,102,156,209.67
  5. Step 5: Solve for x
    x = 2,102,156,209.67/72,043.07
  6. Step 6: Final answer
    x = 29,179.16

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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.