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Finding the Fourth Proportional to 72,153.99, 108,187.25 and 30,017.79

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Solution

The fourth proportional to 72,153.99, 108,187.25 and 30,017.79 is: 45,008.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,153.99 : 108,187.25 = 30,017.79 : x
  2. Step 2: Convert to fraction form
    72,153.99/108,187.25 = 30,017.79/x
  3. Step 3: Cross multiply
    72,153.99x = 108,187.25 × 30,017.79
  4. Step 4: Simplify right side
    72,153.99x = 3,247,542,001.09
  5. Step 5: Solve for x
    x = 3,247,542,001.09/72,153.99
  6. Step 6: Final answer
    x = 45,008.49

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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.