Home / 428,624.15-642,886.97-113,105.66

Finding the Fourth Proportional to 428,624.15, 642,886.97 and 113,105.66

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Solution

The fourth proportional to 428,624.15, 642,886.97 and 113,105.66 is: 169,645.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,624.15 : 642,886.97 = 113,105.66 : x
  2. Step 2: Convert to fraction form
    428,624.15/642,886.97 = 113,105.66/x
  3. Step 3: Cross multiply
    428,624.15x = 642,886.97 × 113,105.66
  4. Step 4: Simplify right side
    428,624.15x = 72,714,151,267.29
  5. Step 5: Solve for x
    x = 72,714,151,267.29/428,624.15
  6. Step 6: Final answer
    x = 169,645.49

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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.