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Finding the Fourth Proportional to 202,492.80, 303,739.20 and 90,172.80

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Solution

The fourth proportional to 202,492.80, 303,739.20 and 90,172.80 is: 135,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,492.80 : 303,739.20 = 90,172.80 : x
  2. Step 2: Convert to fraction form
    202,492.80/303,739.20 = 90,172.80/x
  3. Step 3: Cross multiply
    202,492.80x = 303,739.20 × 90,172.80
  4. Step 4: Simplify right side
    202,492.80x = 27,389,014,133.76
  5. Step 5: Solve for x
    x = 27,389,014,133.76/202,492.80
  6. Step 6: Final answer
    x = 135,259.20

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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.