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Finding the Fourth Proportional to 72,403.40, 108,601.15 and 19,809.09

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Solution

The fourth proportional to 72,403.40, 108,601.15 and 19,809.09 is: 29,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.40 : 108,601.15 = 19,809.09 : x
  2. Step 2: Convert to fraction form
    72,403.40/108,601.15 = 19,809.09/x
  3. Step 3: Cross multiply
    72,403.40x = 108,601.15 × 19,809.09
  4. Step 4: Simplify right side
    72,403.40x = 2,151,289,954.45
  5. Step 5: Solve for x
    x = 2,151,289,954.45/72,403.40
  6. Step 6: Final answer
    x = 29,712.55

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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.