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Finding the Fourth Proportional to 139,052.54, 191,892.92 and 75,390.36

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Solution

The fourth proportional to 139,052.54, 191,892.92 and 75,390.36 is: 104,038.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,052.54 : 191,892.92 = 75,390.36 : x
  2. Step 2: Convert to fraction form
    139,052.54/191,892.92 = 75,390.36/x
  3. Step 3: Cross multiply
    139,052.54x = 191,892.92 × 75,390.36
  4. Step 4: Simplify right side
    139,052.54x = 14,466,875,943.30
  5. Step 5: Solve for x
    x = 14,466,875,943.30/139,052.54
  6. Step 6: Final answer
    x = 104,038.92

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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.