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Finding the Fourth Proportional to 100,733.90, 139,012.81 and 55,411.97

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Solution

The fourth proportional to 100,733.90, 139,012.81 and 55,411.97 is: 76,468.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,733.90 : 139,012.81 = 55,411.97 : x
  2. Step 2: Convert to fraction form
    100,733.90/139,012.81 = 55,411.97/x
  3. Step 3: Cross multiply
    100,733.90x = 139,012.81 × 55,411.97
  4. Step 4: Simplify right side
    100,733.90x = 7,702,972,823.74
  5. Step 5: Solve for x
    x = 7,702,972,823.74/100,733.90
  6. Step 6: Final answer
    x = 76,468.53

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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.