Home / 345,751.20-518,699.70-109,117.80

Finding the Fourth Proportional to 345,751.20, 518,699.70 and 109,117.80

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Solution

The fourth proportional to 345,751.20, 518,699.70 and 109,117.80 is: 163,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,751.20 : 518,699.70 = 109,117.80 : x
  2. Step 2: Convert to fraction form
    345,751.20/518,699.70 = 109,117.80/x
  3. Step 3: Cross multiply
    345,751.20x = 518,699.70 × 109,117.80
  4. Step 4: Simplify right side
    345,751.20x = 56,599,370,124.66
  5. Step 5: Solve for x
    x = 56,599,370,124.66/345,751.20
  6. Step 6: Final answer
    x = 163,699.71

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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.