Home / 191,140.11-263,780.12-105,105.64

Finding the Fourth Proportional to 191,140.11, 263,780.12 and 105,105.64

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Solution

The fourth proportional to 191,140.11, 263,780.12 and 105,105.64 is: 145,049.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,140.11 : 263,780.12 = 105,105.64 : x
  2. Step 2: Convert to fraction form
    191,140.11/263,780.12 = 105,105.64/x
  3. Step 3: Cross multiply
    191,140.11x = 263,780.12 × 105,105.64
  4. Step 4: Simplify right side
    191,140.11x = 27,724,778,331.88
  5. Step 5: Solve for x
    x = 27,724,778,331.88/191,140.11
  6. Step 6: Final answer
    x = 145,049.50

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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.