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Finding the Fourth Proportional to 205,117.80, 307,691.10 and 116,413.80

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Solution

The fourth proportional to 205,117.80, 307,691.10 and 116,413.80 is: 174,628.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,117.80 : 307,691.10 = 116,413.80 : x
  2. Step 2: Convert to fraction form
    205,117.80/307,691.10 = 116,413.80/x
  3. Step 3: Cross multiply
    205,117.80x = 307,691.10 × 116,413.80
  4. Step 4: Simplify right side
    205,117.80x = 35,819,490,177.18
  5. Step 5: Solve for x
    x = 35,819,490,177.18/205,117.80
  6. Step 6: Final answer
    x = 174,628.87

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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.