Home / 345,619.20-518,428.80-108,985.80

Finding the Fourth Proportional to 345,619.20, 518,428.80 and 108,985.80

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Solution

The fourth proportional to 345,619.20, 518,428.80 and 108,985.80 is: 163,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,619.20 : 518,428.80 = 108,985.80 : x
  2. Step 2: Convert to fraction form
    345,619.20/518,428.80 = 108,985.80/x
  3. Step 3: Cross multiply
    345,619.20x = 518,428.80 × 108,985.80
  4. Step 4: Simplify right side
    345,619.20x = 56,501,377,511.04
  5. Step 5: Solve for x
    x = 56,501,377,511.04/345,619.20
  6. Step 6: Final answer
    x = 163,478.70

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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.