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Finding the Fourth Proportional to 115,161.79, 172,742.70 and 44,991.91

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Solution

The fourth proportional to 115,161.79, 172,742.70 and 44,991.91 is: 67,487.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,161.79 : 172,742.70 = 44,991.91 : x
  2. Step 2: Convert to fraction form
    115,161.79/172,742.70 = 44,991.91/x
  3. Step 3: Cross multiply
    115,161.79x = 172,742.70 × 44,991.91
  4. Step 4: Simplify right side
    115,161.79x = 7,772,024,011.56
  5. Step 5: Solve for x
    x = 7,772,024,011.56/115,161.79
  6. Step 6: Final answer
    x = 67,487.87

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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.