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Finding the Fourth Proportional to 139,411.36, 192,390.56 and 75,753.28

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Solution

The fourth proportional to 139,411.36, 192,390.56 and 75,753.28 is: 104,541.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,411.36 : 192,390.56 = 75,753.28 : x
  2. Step 2: Convert to fraction form
    139,411.36/192,390.56 = 75,753.28/x
  3. Step 3: Cross multiply
    139,411.36x = 192,390.56 × 75,753.28
  4. Step 4: Simplify right side
    139,411.36x = 14,574,215,961.04
  5. Step 5: Solve for x
    x = 14,574,215,961.04/139,411.36
  6. Step 6: Final answer
    x = 104,541.09

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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.