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Finding the Fourth Proportional to 100,818.82, 139,124.91 and 55,495.68

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Solution

The fourth proportional to 100,818.82, 139,124.91 and 55,495.68 is: 76,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,818.82 : 139,124.91 = 55,495.68 : x
  2. Step 2: Convert to fraction form
    100,818.82/139,124.91 = 55,495.68/x
  3. Step 3: Cross multiply
    100,818.82x = 139,124.91 × 55,495.68
  4. Step 4: Simplify right side
    100,818.82x = 7,720,831,485.39
  5. Step 5: Solve for x
    x = 7,720,831,485.39/100,818.82
  6. Step 6: Final answer
    x = 76,581.25

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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.