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Finding the Fourth Proportional to 139,813.96, 192,943.56 and 76,151.56

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Solution

The fourth proportional to 139,813.96, 192,943.56 and 76,151.56 is: 105,089.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,813.96 : 192,943.56 = 76,151.56 : x
  2. Step 2: Convert to fraction form
    139,813.96/192,943.56 = 76,151.56/x
  3. Step 3: Cross multiply
    139,813.96x = 192,943.56 × 76,151.56
  4. Step 4: Simplify right side
    139,813.96x = 14,692,953,085.95
  5. Step 5: Solve for x
    x = 14,692,953,085.95/139,813.96
  6. Step 6: Final answer
    x = 105,089.31

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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.