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Finding the Fourth Proportional to 172,066.80, 237,410.64 and 100,405.92

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Solution

The fourth proportional to 172,066.80, 237,410.64 and 100,405.92 is: 138,535.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,066.80 : 237,410.64 = 100,405.92 : x
  2. Step 2: Convert to fraction form
    172,066.80/237,410.64 = 100,405.92/x
  3. Step 3: Cross multiply
    172,066.80x = 237,410.64 × 100,405.92
  4. Step 4: Simplify right side
    172,066.80x = 23,837,433,726.99
  5. Step 5: Solve for x
    x = 23,837,433,726.99/172,066.80
  6. Step 6: Final answer
    x = 138,535.93

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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.