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Finding the Fourth Proportional to 500,191.70, 750,289.43 and 121,111.82

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Solution

The fourth proportional to 500,191.70, 750,289.43 and 121,111.82 is: 181,668.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,191.70 : 750,289.43 = 121,111.82 : x
  2. Step 2: Convert to fraction form
    500,191.70/750,289.43 = 121,111.82/x
  3. Step 3: Cross multiply
    500,191.70x = 750,289.43 × 121,111.82
  4. Step 4: Simplify right side
    500,191.70x = 90,868,918,394.06
  5. Step 5: Solve for x
    x = 90,868,918,394.06/500,191.70
  6. Step 6: Final answer
    x = 181,668.19

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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.