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Finding the Fourth Proportional to 201,630.80, 302,446.20 and 139,422.80

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Solution

The fourth proportional to 201,630.80, 302,446.20 and 139,422.80 is: 209,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,630.80 : 302,446.20 = 139,422.80 : x
  2. Step 2: Convert to fraction form
    201,630.80/302,446.20 = 139,422.80/x
  3. Step 3: Cross multiply
    201,630.80x = 302,446.20 × 139,422.80
  4. Step 4: Simplify right side
    201,630.80x = 42,167,896,053.36
  5. Step 5: Solve for x
    x = 42,167,896,053.36/201,630.80
  6. Step 6: Final answer
    x = 209,134.20

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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.