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Finding the Fourth Proportional to 201,728.80, 302,593.20 and 127,079.20

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Solution

The fourth proportional to 201,728.80, 302,593.20 and 127,079.20 is: 190,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,728.80 : 302,593.20 = 127,079.20 : x
  2. Step 2: Convert to fraction form
    201,728.80/302,593.20 = 127,079.20/x
  3. Step 3: Cross multiply
    201,728.80x = 302,593.20 × 127,079.20
  4. Step 4: Simplify right side
    201,728.80x = 38,453,301,781.44
  5. Step 5: Solve for x
    x = 38,453,301,781.44/201,728.80
  6. Step 6: Final answer
    x = 190,618.80

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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.