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Finding the Fourth Proportional to 101,436.86, 139,935.70 and 65,638.44

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Solution

The fourth proportional to 101,436.86, 139,935.70 and 65,638.44 is: 90,550.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,436.86 : 139,935.70 = 65,638.44 : x
  2. Step 2: Convert to fraction form
    101,436.86/139,935.70 = 65,638.44/x
  3. Step 3: Cross multiply
    101,436.86x = 139,935.70 × 65,638.44
  4. Step 4: Simplify right side
    101,436.86x = 9,185,161,048.31
  5. Step 5: Solve for x
    x = 9,185,161,048.31/101,436.86
  6. Step 6: Final answer
    x = 90,550.53

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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.