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Finding the Fourth Proportional to 72,659.19, 108,995.04 and 20,068.68

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Solution

The fourth proportional to 72,659.19, 108,995.04 and 20,068.68 is: 30,104.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,659.19 : 108,995.04 = 20,068.68 : x
  2. Step 2: Convert to fraction form
    72,659.19/108,995.04 = 20,068.68/x
  3. Step 3: Cross multiply
    72,659.19x = 108,995.04 × 20,068.68
  4. Step 4: Simplify right side
    72,659.19x = 2,187,386,579.35
  5. Step 5: Solve for x
    x = 2,187,386,579.35/72,659.19
  6. Step 6: Final answer
    x = 30,104.75

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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.