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Finding the Fourth Proportional to 106,872.48, 147,390.48 and 69,109.92

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Solution

The fourth proportional to 106,872.48, 147,390.48 and 69,109.92 is: 95,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,872.48 : 147,390.48 = 69,109.92 : x
  2. Step 2: Convert to fraction form
    106,872.48/147,390.48 = 69,109.92/x
  3. Step 3: Cross multiply
    106,872.48x = 147,390.48 × 69,109.92
  4. Step 4: Simplify right side
    106,872.48x = 10,186,144,281.56
  5. Step 5: Solve for x
    x = 10,186,144,281.56/106,872.48
  6. Step 6: Final answer
    x = 95,311.20

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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.