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Finding the Fourth Proportional to 72,209.52, 108,316.50 and 19,620.12

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Solution

The fourth proportional to 72,209.52, 108,316.50 and 19,620.12 is: 29,430.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,209.52 : 108,316.50 = 19,620.12 : x
  2. Step 2: Convert to fraction form
    72,209.52/108,316.50 = 19,620.12/x
  3. Step 3: Cross multiply
    72,209.52x = 108,316.50 × 19,620.12
  4. Step 4: Simplify right side
    72,209.52x = 2,125,182,727.98
  5. Step 5: Solve for x
    x = 2,125,182,727.98/72,209.52
  6. Step 6: Final answer
    x = 29,430.78

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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.