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Finding the Fourth Proportional to 139,541.76, 192,555.12 and 77,453.88

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Solution

The fourth proportional to 139,541.76, 192,555.12 and 77,453.88 is: 106,879.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,541.76 : 192,555.12 = 77,453.88 : x
  2. Step 2: Convert to fraction form
    139,541.76/192,555.12 = 77,453.88/x
  3. Step 3: Cross multiply
    139,541.76x = 192,555.12 × 77,453.88
  4. Step 4: Simplify right side
    139,541.76x = 14,914,141,157.87
  5. Step 5: Solve for x
    x = 14,914,141,157.87/139,541.76
  6. Step 6: Final answer
    x = 106,879.41

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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.