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Finding the Fourth Proportional to 107,908.58, 148,860.92 and 72,107.40

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Solution

The fourth proportional to 107,908.58, 148,860.92 and 72,107.40 is: 99,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,908.58 : 148,860.92 = 72,107.40 : x
  2. Step 2: Convert to fraction form
    107,908.58/148,860.92 = 72,107.40/x
  3. Step 3: Cross multiply
    107,908.58x = 148,860.92 × 72,107.40
  4. Step 4: Simplify right side
    107,908.58x = 10,733,973,902.81
  5. Step 5: Solve for x
    x = 10,733,973,902.81/107,908.58
  6. Step 6: Final answer
    x = 99,472.85

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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.