Home / 208,780.12-313,016.80-66,543.56

Finding the Fourth Proportional to 208,780.12, 313,016.80 and 66,543.56

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Solution

The fourth proportional to 208,780.12, 313,016.80 and 66,543.56 is: 99,766.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,780.12 : 313,016.80 = 66,543.56 : x
  2. Step 2: Convert to fraction form
    208,780.12/313,016.80 = 66,543.56/x
  3. Step 3: Cross multiply
    208,780.12x = 313,016.80 × 66,543.56
  4. Step 4: Simplify right side
    208,780.12x = 20,829,252,211.81
  5. Step 5: Solve for x
    x = 20,829,252,211.81/208,780.12
  6. Step 6: Final answer
    x = 99,766.45

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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.