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Finding the Fourth Proportional to 142,490.80, 213,736.20 and 137,047.60

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Solution

The fourth proportional to 142,490.80, 213,736.20 and 137,047.60 is: 205,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,490.80 : 213,736.20 = 137,047.60 : x
  2. Step 2: Convert to fraction form
    142,490.80/213,736.20 = 137,047.60/x
  3. Step 3: Cross multiply
    142,490.80x = 213,736.20 × 137,047.60
  4. Step 4: Simplify right side
    142,490.80x = 29,292,033,243.12
  5. Step 5: Solve for x
    x = 29,292,033,243.12/142,490.80
  6. Step 6: Final answer
    x = 205,571.40

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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.