Home / 127,643.40-191,465.10-121,519.80

Finding the Fourth Proportional to 127,643.40, 191,465.10 and 121,519.80

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Solution

The fourth proportional to 127,643.40, 191,465.10 and 121,519.80 is: 182,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,643.40 : 191,465.10 = 121,519.80 : x
  2. Step 2: Convert to fraction form
    127,643.40/191,465.10 = 121,519.80/x
  3. Step 3: Cross multiply
    127,643.40x = 191,465.10 × 121,519.80
  4. Step 4: Simplify right side
    127,643.40x = 23,266,800,658.98
  5. Step 5: Solve for x
    x = 23,266,800,658.98/127,643.40
  6. Step 6: Final answer
    x = 182,279.70

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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.