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Finding the Fourth Proportional to 108,378.10, 162,479.67 and 99,630.10

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Solution

The fourth proportional to 108,378.10, 162,479.67 and 99,630.10 is: 149,364.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,378.10 : 162,479.67 = 99,630.10 : x
  2. Step 2: Convert to fraction form
    108,378.10/162,479.67 = 99,630.10/x
  3. Step 3: Cross multiply
    108,378.10x = 162,479.67 × 99,630.10
  4. Step 4: Simplify right side
    108,378.10x = 16,187,865,770.07
  5. Step 5: Solve for x
    x = 16,187,865,770.07/108,378.10
  6. Step 6: Final answer
    x = 149,364.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.