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Finding the Fourth Proportional to 109,398.88, 149,985.92 and 107,406.08

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Solution

The fourth proportional to 109,398.88, 149,985.92 and 107,406.08 is: 147,253.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,398.88 : 149,985.92 = 107,406.08 : x
  2. Step 2: Convert to fraction form
    109,398.88/149,985.92 = 107,406.08/x
  3. Step 3: Cross multiply
    109,398.88x = 149,985.92 × 107,406.08
  4. Step 4: Simplify right side
    109,398.88x = 16,109,399,722.39
  5. Step 5: Solve for x
    x = 16,109,399,722.39/109,398.88
  6. Step 6: Final answer
    x = 147,253.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.