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Finding the Fourth Proportional to 142,754.80, 214,132.20 and 128,009.20

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Solution

The fourth proportional to 142,754.80, 214,132.20 and 128,009.20 is: 192,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,754.80 : 214,132.20 = 128,009.20 : x
  2. Step 2: Convert to fraction form
    142,754.80/214,132.20 = 128,009.20/x
  3. Step 3: Cross multiply
    142,754.80x = 214,132.20 × 128,009.20
  4. Step 4: Simplify right side
    142,754.80x = 27,410,891,616.24
  5. Step 5: Solve for x
    x = 27,410,891,616.24/142,754.80
  6. Step 6: Final answer
    x = 192,013.80

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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.