Home / 127,815.80-191,723.70-115,374.20

Finding the Fourth Proportional to 127,815.80, 191,723.70 and 115,374.20

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Solution

The fourth proportional to 127,815.80, 191,723.70 and 115,374.20 is: 173,061.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,815.80 : 191,723.70 = 115,374.20 : x
  2. Step 2: Convert to fraction form
    127,815.80/191,723.70 = 115,374.20/x
  3. Step 3: Cross multiply
    127,815.80x = 191,723.70 × 115,374.20
  4. Step 4: Simplify right side
    127,815.80x = 22,119,968,508.54
  5. Step 5: Solve for x
    x = 22,119,968,508.54/127,815.80
  6. Step 6: Final answer
    x = 173,061.30

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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.