Home / 121,160.20-181,934.70-81,891.40

Finding the Fourth Proportional to 121,160.20, 181,934.70 and 81,891.40

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Solution

The fourth proportional to 121,160.20, 181,934.70 and 81,891.40 is: 122,968.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,160.20 : 181,934.70 = 81,891.40 : x
  2. Step 2: Convert to fraction form
    121,160.20/181,934.70 = 81,891.40/x
  3. Step 3: Cross multiply
    121,160.20x = 181,934.70 × 81,891.40
  4. Step 4: Simplify right side
    121,160.20x = 14,898,887,291.58
  5. Step 5: Solve for x
    x = 14,898,887,291.58/121,160.20
  6. Step 6: Final answer
    x = 122,968.49

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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.