Home / 121,170.20-181,949.70-81,901.40

Finding the Fourth Proportional to 121,170.20, 181,949.70 and 81,901.40

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Solution

The fourth proportional to 121,170.20, 181,949.70 and 81,901.40 is: 122,983.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,170.20 : 181,949.70 = 81,901.40 : x
  2. Step 2: Convert to fraction form
    121,170.20/181,949.70 = 81,901.40/x
  3. Step 3: Cross multiply
    121,170.20x = 181,949.70 × 81,901.40
  4. Step 4: Simplify right side
    121,170.20x = 14,901,935,159.58
  5. Step 5: Solve for x
    x = 14,901,935,159.58/121,170.20
  6. Step 6: Final answer
    x = 122,983.50

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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.