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Finding the Fourth Proportional to 136,980.76, 189,032.87 and 76,551.37

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Solution

The fourth proportional to 136,980.76, 189,032.87 and 76,551.37 is: 105,640.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,980.76 : 189,032.87 = 76,551.37 : x
  2. Step 2: Convert to fraction form
    136,980.76/189,032.87 = 76,551.37/x
  3. Step 3: Cross multiply
    136,980.76x = 189,032.87 × 76,551.37
  4. Step 4: Simplify right side
    136,980.76x = 14,470,724,228.37
  5. Step 5: Solve for x
    x = 14,470,724,228.37/136,980.76
  6. Step 6: Final answer
    x = 105,640.56

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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.