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Finding the Fourth Proportional to 73,085.68, 109,632.63 and 20,499.28

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Solution

The fourth proportional to 73,085.68, 109,632.63 and 20,499.28 is: 30,750.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,085.68 : 109,632.63 = 20,499.28 : x
  2. Step 2: Convert to fraction form
    73,085.68/109,632.63 = 20,499.28/x
  3. Step 3: Cross multiply
    73,085.68x = 109,632.63 × 20,499.28
  4. Step 4: Simplify right side
    73,085.68x = 2,247,389,979.51
  5. Step 5: Solve for x
    x = 2,247,389,979.51/73,085.68
  6. Step 6: Final answer
    x = 30,750.07

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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.