Home / 142,029.20-196,009.80-81,619.40

Finding the Fourth Proportional to 142,029.20, 196,009.80 and 81,619.40

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Solution

The fourth proportional to 142,029.20, 196,009.80 and 81,619.40 is: 112,640.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,029.20 : 196,009.80 = 81,619.40 : x
  2. Step 2: Convert to fraction form
    142,029.20/196,009.80 = 81,619.40/x
  3. Step 3: Cross multiply
    142,029.20x = 196,009.80 × 81,619.40
  4. Step 4: Simplify right side
    142,029.20x = 15,998,202,270.12
  5. Step 5: Solve for x
    x = 15,998,202,270.12/142,029.20
  6. Step 6: Final answer
    x = 112,640.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.