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Finding the Fourth Proportional to 113,674.28, 156,820.74 and 108,403.88

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Solution

The fourth proportional to 113,674.28, 156,820.74 and 108,403.88 is: 149,549.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,674.28 : 156,820.74 = 108,403.88 : x
  2. Step 2: Convert to fraction form
    113,674.28/156,820.74 = 108,403.88/x
  3. Step 3: Cross multiply
    113,674.28x = 156,820.74 × 108,403.88
  4. Step 4: Simplify right side
    113,674.28x = 16,999,976,680.47
  5. Step 5: Solve for x
    x = 16,999,976,680.47/113,674.28
  6. Step 6: Final answer
    x = 149,549.90

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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.