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Finding the Fourth Proportional to 136,220.40, 204,316.20 and 42,721.20

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Solution

The fourth proportional to 136,220.40, 204,316.20 and 42,721.20 is: 64,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,220.40 : 204,316.20 = 42,721.20 : x
  2. Step 2: Convert to fraction form
    136,220.40/204,316.20 = 42,721.20/x
  3. Step 3: Cross multiply
    136,220.40x = 204,316.20 × 42,721.20
  4. Step 4: Simplify right side
    136,220.40x = 8,728,633,243.44
  5. Step 5: Solve for x
    x = 8,728,633,243.44/136,220.40
  6. Step 6: Final answer
    x = 64,077.28

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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.