Home / 142,186.20-196,228.56-81,776.40

Finding the Fourth Proportional to 142,186.20, 196,228.56 and 81,776.40

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Solution

The fourth proportional to 142,186.20, 196,228.56 and 81,776.40 is: 112,858.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,186.20 : 196,228.56 = 81,776.40 : x
  2. Step 2: Convert to fraction form
    142,186.20/196,228.56 = 81,776.40/x
  3. Step 3: Cross multiply
    142,186.20x = 196,228.56 × 81,776.40
  4. Step 4: Simplify right side
    142,186.20x = 16,046,865,213.98
  5. Step 5: Solve for x
    x = 16,046,865,213.98/142,186.20
  6. Step 6: Final answer
    x = 112,858.11

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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.