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Finding the Fourth Proportional to 172,406.93, 237,917.87 and 99,812.88

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Solution

The fourth proportional to 172,406.93, 237,917.87 and 99,812.88 is: 137,739.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,406.93 : 237,917.87 = 99,812.88 : x
  2. Step 2: Convert to fraction form
    172,406.93/237,917.87 = 99,812.88/x
  3. Step 3: Cross multiply
    172,406.93x = 237,917.87 × 99,812.88
  4. Step 4: Simplify right side
    172,406.93x = 23,747,267,309.10
  5. Step 5: Solve for x
    x = 23,747,267,309.10/172,406.93
  6. Step 6: Final answer
    x = 137,739.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.