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Finding the Fourth Proportional to 191,391.75, 286,991.10 and 111,455.55

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Solution

The fourth proportional to 191,391.75, 286,991.10 and 111,455.55 is: 167,127.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,391.75 : 286,991.10 = 111,455.55 : x
  2. Step 2: Convert to fraction form
    191,391.75/286,991.10 = 111,455.55/x
  3. Step 3: Cross multiply
    191,391.75x = 286,991.10 × 111,455.55
  4. Step 4: Simplify right side
    191,391.75x = 31,986,750,895.61
  5. Step 5: Solve for x
    x = 31,986,750,895.61/191,391.75
  6. Step 6: Final answer
    x = 167,127.11

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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.