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Finding the Fourth Proportional to 73,139.70, 109,741.41 and 28,798.68

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Solution

The fourth proportional to 73,139.70, 109,741.41 and 28,798.68 is: 43,210.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.70 : 109,741.41 = 28,798.68 : x
  2. Step 2: Convert to fraction form
    73,139.70/109,741.41 = 28,798.68/x
  3. Step 3: Cross multiply
    73,139.70x = 109,741.41 × 28,798.68
  4. Step 4: Simplify right side
    73,139.70x = 3,160,407,749.34
  5. Step 5: Solve for x
    x = 3,160,407,749.34/73,139.70
  6. Step 6: Final answer
    x = 43,210.56

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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.