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Finding the Fourth Proportional to 202,300.80, 303,451.20 and 139,315.20

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Solution

The fourth proportional to 202,300.80, 303,451.20 and 139,315.20 is: 208,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,300.80 : 303,451.20 = 139,315.20 : x
  2. Step 2: Convert to fraction form
    202,300.80/303,451.20 = 139,315.20/x
  3. Step 3: Cross multiply
    202,300.80x = 303,451.20 × 139,315.20
  4. Step 4: Simplify right side
    202,300.80x = 42,275,364,618.24
  5. Step 5: Solve for x
    x = 42,275,364,618.24/202,300.80
  6. Step 6: Final answer
    x = 208,972.80

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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.