Home / 345,780.56-518,670.92-109,141.68

Finding the Fourth Proportional to 345,780.56, 518,670.92 and 109,141.68

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Solution

The fourth proportional to 345,780.56, 518,670.92 and 109,141.68 is: 163,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,780.56 : 518,670.92 = 109,141.68 : x
  2. Step 2: Convert to fraction form
    345,780.56/518,670.92 = 109,141.68/x
  3. Step 3: Cross multiply
    345,780.56x = 518,670.92 × 109,141.68
  4. Step 4: Simplify right side
    345,780.56x = 56,608,615,575.95
  5. Step 5: Solve for x
    x = 56,608,615,575.95/345,780.56
  6. Step 6: Final answer
    x = 163,712.55

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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.