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Finding the Fourth Proportional to 139,490.51, 192,496.10 and 75,826.94

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Solution

The fourth proportional to 139,490.51, 192,496.10 and 75,826.94 is: 104,640.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,490.51 : 192,496.10 = 75,826.94 : x
  2. Step 2: Convert to fraction form
    139,490.51/192,496.10 = 75,826.94/x
  3. Step 3: Cross multiply
    139,490.51x = 192,496.10 × 75,826.94
  4. Step 4: Simplify right side
    139,490.51x = 14,596,388,883.32
  5. Step 5: Solve for x
    x = 14,596,388,883.32/139,490.51
  6. Step 6: Final answer
    x = 104,640.73

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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.