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Finding the Fourth Proportional to 139,011.68, 191,836.82 and 75,348.92

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Solution

The fourth proportional to 139,011.68, 191,836.82 and 75,348.92 is: 103,981.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,011.68 : 191,836.82 = 75,348.92 : x
  2. Step 2: Convert to fraction form
    139,011.68/191,836.82 = 75,348.92/x
  3. Step 3: Cross multiply
    139,011.68x = 191,836.82 × 75,348.92
  4. Step 4: Simplify right side
    139,011.68x = 14,454,697,203.23
  5. Step 5: Solve for x
    x = 14,454,697,203.23/139,011.68
  6. Step 6: Final answer
    x = 103,981.89

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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.