Home / 201,988.40-302,545.20-131,129.60

Finding the Fourth Proportional to 201,988.40, 302,545.20 and 131,129.60

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Solution

The fourth proportional to 201,988.40, 302,545.20 and 131,129.60 is: 196,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,988.40 : 302,545.20 = 131,129.60 : x
  2. Step 2: Convert to fraction form
    201,988.40/302,545.20 = 131,129.60/x
  3. Step 3: Cross multiply
    201,988.40x = 302,545.20 × 131,129.60
  4. Step 4: Simplify right side
    201,988.40x = 39,672,631,057.92
  5. Step 5: Solve for x
    x = 39,672,631,057.92/201,988.40
  6. Step 6: Final answer
    x = 196,410.44

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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.