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Finding the Fourth Proportional to 101,292.48, 139,692.81 and 84,352.81

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Solution

The fourth proportional to 101,292.48, 139,692.81 and 84,352.81 is: 116,331.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,292.48 : 139,692.81 = 84,352.81 : x
  2. Step 2: Convert to fraction form
    101,292.48/139,692.81 = 84,352.81/x
  3. Step 3: Cross multiply
    101,292.48x = 139,692.81 × 84,352.81
  4. Step 4: Simplify right side
    101,292.48x = 11,783,481,060.30
  5. Step 5: Solve for x
    x = 11,783,481,060.30/101,292.48
  6. Step 6: Final answer
    x = 116,331.26

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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.