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Finding the Fourth Proportional to 101,292.81, 139,793.90 and 55,981.41

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Solution

The fourth proportional to 101,292.81, 139,793.90 and 55,981.41 is: 77,259.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,292.81 : 139,793.90 = 55,981.41 : x
  2. Step 2: Convert to fraction form
    101,292.81/139,793.90 = 55,981.41/x
  3. Step 3: Cross multiply
    101,292.81x = 139,793.90 × 55,981.41
  4. Step 4: Simplify right side
    101,292.81x = 7,825,859,351.49
  5. Step 5: Solve for x
    x = 7,825,859,351.49/101,292.81
  6. Step 6: Final answer
    x = 77,259.77

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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.