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Finding the Fourth Proportional to 139,158.76, 192,057.17 and 77,928.26

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Solution

The fourth proportional to 139,158.76, 192,057.17 and 77,928.26 is: 107,551.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,158.76 : 192,057.17 = 77,928.26 : x
  2. Step 2: Convert to fraction form
    139,158.76/192,057.17 = 77,928.26/x
  3. Step 3: Cross multiply
    139,158.76x = 192,057.17 × 77,928.26
  4. Step 4: Simplify right side
    139,158.76x = 14,966,681,247.37
  5. Step 5: Solve for x
    x = 14,966,681,247.37/139,158.76
  6. Step 6: Final answer
    x = 107,551.13

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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.