Home / 142,196.20-196,242.36-81,786.40

Finding the Fourth Proportional to 142,196.20, 196,242.36 and 81,786.40

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Solution

The fourth proportional to 142,196.20, 196,242.36 and 81,786.40 is: 112,871.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,196.20 : 196,242.36 = 81,786.40 : x
  2. Step 2: Convert to fraction form
    142,196.20/196,242.36 = 81,786.40/x
  3. Step 3: Cross multiply
    142,196.20x = 196,242.36 × 81,786.40
  4. Step 4: Simplify right side
    142,196.20x = 16,049,956,151.90
  5. Step 5: Solve for x
    x = 16,049,956,151.90/142,196.20
  6. Step 6: Final answer
    x = 112,871.91

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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.