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Finding the Fourth Proportional to 139,011, 191,834.10 and 75,347.16

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Solution

The fourth proportional to 139,011, 191,834.10 and 75,347.16 is: 103,978.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,011 : 191,834.10 = 75,347.16 : x
  2. Step 2: Convert to fraction form
    139,011/191,834.10 = 75,347.16/x
  3. Step 3: Cross multiply
    139,011x = 191,834.10 × 75,347.16
  4. Step 4: Simplify right side
    139,011x = 14,454,154,626.16
  5. Step 5: Solve for x
    x = 14,454,154,626.16/139,011
  6. Step 6: Final answer
    x = 103,978.50

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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.