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Finding the Fourth Proportional to 208,489.20, 312,733.80 and 125,545.20

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Solution

The fourth proportional to 208,489.20, 312,733.80 and 125,545.20 is: 188,317.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,489.20 : 312,733.80 = 125,545.20 : x
  2. Step 2: Convert to fraction form
    208,489.20/312,733.80 = 125,545.20/x
  3. Step 3: Cross multiply
    208,489.20x = 312,733.80 × 125,545.20
  4. Step 4: Simplify right side
    208,489.20x = 39,262,227,467.76
  5. Step 5: Solve for x
    x = 39,262,227,467.76/208,489.20
  6. Step 6: Final answer
    x = 188,317.80

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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.