Home / 209,934.60-314,940.30-85,288.20

Finding the Fourth Proportional to 209,934.60, 314,940.30 and 85,288.20

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Solution

The fourth proportional to 209,934.60, 314,940.30 and 85,288.20 is: 127,947.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,934.60 : 314,940.30 = 85,288.20 : x
  2. Step 2: Convert to fraction form
    209,934.60/314,940.30 = 85,288.20/x
  3. Step 3: Cross multiply
    209,934.60x = 314,940.30 × 85,288.20
  4. Step 4: Simplify right side
    209,934.60x = 26,860,691,294.46
  5. Step 5: Solve for x
    x = 26,860,691,294.46/209,934.60
  6. Step 6: Final answer
    x = 127,947.90

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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.