Home / 138,784.14-191,521.44-78,354.18

Finding the Fourth Proportional to 138,784.14, 191,521.44 and 78,354.18

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Solution

The fourth proportional to 138,784.14, 191,521.44 and 78,354.18 is: 108,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,784.14 : 191,521.44 = 78,354.18 : x
  2. Step 2: Convert to fraction form
    138,784.14/191,521.44 = 78,354.18/x
  3. Step 3: Cross multiply
    138,784.14x = 191,521.44 × 78,354.18
  4. Step 4: Simplify right side
    138,784.14x = 15,006,505,383.62
  5. Step 5: Solve for x
    x = 15,006,505,383.62/138,784.14
  6. Step 6: Final answer
    x = 108,128.39

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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.