Home / 205,403.40-308,105.10-72,433.80

Finding the Fourth Proportional to 205,403.40, 308,105.10 and 72,433.80

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Solution

The fourth proportional to 205,403.40, 308,105.10 and 72,433.80 is: 108,650.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,403.40 : 308,105.10 = 72,433.80 : x
  2. Step 2: Convert to fraction form
    205,403.40/308,105.10 = 72,433.80/x
  3. Step 3: Cross multiply
    205,403.40x = 308,105.10 × 72,433.80
  4. Step 4: Simplify right side
    205,403.40x = 22,317,223,192.38
  5. Step 5: Solve for x
    x = 22,317,223,192.38/205,403.40
  6. Step 6: Final answer
    x = 108,650.70

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1.5x scale

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.