Home / 149,186.80-205,882.15-81,208.20

Finding the Fourth Proportional to 149,186.80, 205,882.15 and 81,208.20

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Solution

The fourth proportional to 149,186.80, 205,882.15 and 81,208.20 is: 112,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,186.80 : 205,882.15 = 81,208.20 : x
  2. Step 2: Convert to fraction form
    149,186.80/205,882.15 = 81,208.20/x
  3. Step 3: Cross multiply
    149,186.80x = 205,882.15 × 81,208.20
  4. Step 4: Simplify right side
    149,186.80x = 16,719,319,531.36
  5. Step 5: Solve for x
    x = 16,719,319,531.36/149,186.80
  6. Step 6: Final answer
    x = 112,069.70

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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.