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Finding the Fourth Proportional to 139,010.59, 191,817.44 and 98,709.65

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Solution

The fourth proportional to 139,010.59, 191,817.44 and 98,709.65 is: 136,207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.59 : 191,817.44 = 98,709.65 : x
  2. Step 2: Convert to fraction form
    139,010.59/191,817.44 = 98,709.65/x
  3. Step 3: Cross multiply
    139,010.59x = 191,817.44 × 98,709.65
  4. Step 4: Simplify right side
    139,010.59x = 18,934,231,407.21
  5. Step 5: Solve for x
    x = 18,934,231,407.21/139,010.59
  6. Step 6: Final answer
    x = 136,207.11

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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.