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Finding the Fourth Proportional to 139,311.90, 192,281.04 and 91,569.69

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Solution

The fourth proportional to 139,311.90, 192,281.04 and 91,569.69 is: 126,386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,311.90 : 192,281.04 = 91,569.69 : x
  2. Step 2: Convert to fraction form
    139,311.90/192,281.04 = 91,569.69/x
  3. Step 3: Cross multiply
    139,311.90x = 192,281.04 × 91,569.69
  4. Step 4: Simplify right side
    139,311.90x = 17,607,115,225.68
  5. Step 5: Solve for x
    x = 17,607,115,225.68/139,311.90
  6. Step 6: Final answer
    x = 126,386.30

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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.