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Finding the Fourth Proportional to 101,762.70, 140,440.94 and 56,455.28

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Solution

The fourth proportional to 101,762.70, 140,440.94 and 56,455.28 is: 77,912.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,762.70 : 140,440.94 = 56,455.28 : x
  2. Step 2: Convert to fraction form
    101,762.70/140,440.94 = 56,455.28/x
  3. Step 3: Cross multiply
    101,762.70x = 140,440.94 × 56,455.28
  4. Step 4: Simplify right side
    101,762.70x = 7,928,631,606.68
  5. Step 5: Solve for x
    x = 7,928,631,606.68/101,762.70
  6. Step 6: Final answer
    x = 77,912.94

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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.