Home / 191,143.08-263,780.64-105,105.60

Finding the Fourth Proportional to 191,143.08, 263,780.64 and 105,105.60

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Solution

The fourth proportional to 191,143.08, 263,780.64 and 105,105.60 is: 145,047.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,143.08 : 263,780.64 = 105,105.60 : x
  2. Step 2: Convert to fraction form
    191,143.08/263,780.64 = 105,105.60/x
  3. Step 3: Cross multiply
    191,143.08x = 263,780.64 × 105,105.60
  4. Step 4: Simplify right side
    191,143.08x = 27,724,822,435.58
  5. Step 5: Solve for x
    x = 27,724,822,435.58/191,143.08
  6. Step 6: Final answer
    x = 145,047.48

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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.