Home / 345,619.85-518,380.56-108,931.77

Finding the Fourth Proportional to 345,619.85, 518,380.56 and 108,931.77

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Solution

The fourth proportional to 345,619.85, 518,380.56 and 108,931.77 is: 163,382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,619.85 : 518,380.56 = 108,931.77 : x
  2. Step 2: Convert to fraction form
    345,619.85/518,380.56 = 108,931.77/x
  3. Step 3: Cross multiply
    345,619.85x = 518,380.56 × 108,931.77
  4. Step 4: Simplify right side
    345,619.85x = 56,468,111,934.39
  5. Step 5: Solve for x
    x = 56,468,111,934.39/345,619.85
  6. Step 6: Final answer
    x = 163,382.15

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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.