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Finding the Fourth Proportional to 261,191.79, 391,935.31 and 111,417.93

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Solution

The fourth proportional to 261,191.79, 391,935.31 and 111,417.93 is: 167,189.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,191.79 : 391,935.31 = 111,417.93 : x
  2. Step 2: Convert to fraction form
    261,191.79/391,935.31 = 111,417.93/x
  3. Step 3: Cross multiply
    261,191.79x = 391,935.31 × 111,417.93
  4. Step 4: Simplify right side
    261,191.79x = 43,668,620,655.56
  5. Step 5: Solve for x
    x = 43,668,620,655.56/261,191.79
  6. Step 6: Final answer
    x = 167,189.87

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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.