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Finding the Fourth Proportional to 139,153.53, 192,015.66 and 77,903.04

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Solution

The fourth proportional to 139,153.53, 192,015.66 and 77,903.04 is: 107,497.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,153.53 : 192,015.66 = 77,903.04 : x
  2. Step 2: Convert to fraction form
    139,153.53/192,015.66 = 77,903.04/x
  3. Step 3: Cross multiply
    139,153.53x = 192,015.66 × 77,903.04
  4. Step 4: Simplify right side
    139,153.53x = 14,958,603,641.61
  5. Step 5: Solve for x
    x = 14,958,603,641.61/139,153.53
  6. Step 6: Final answer
    x = 107,497.12

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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.