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Finding the Fourth Proportional to 139,303.99, 192,240.29 and 75,641.80

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Solution

The fourth proportional to 139,303.99, 192,240.29 and 75,641.80 is: 104,386.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,303.99 : 192,240.29 = 75,641.80 : x
  2. Step 2: Convert to fraction form
    139,303.99/192,240.29 = 75,641.80/x
  3. Step 3: Cross multiply
    139,303.99x = 192,240.29 × 75,641.80
  4. Step 4: Simplify right side
    139,303.99x = 14,541,401,189.91
  5. Step 5: Solve for x
    x = 14,541,401,189.91/139,303.99
  6. Step 6: Final answer
    x = 104,386.11

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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.