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Finding the Fourth Proportional to 100,903.44, 139,247.73 and 55,581.63

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Solution

The fourth proportional to 100,903.44, 139,247.73 and 55,581.63 is: 76,703.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,903.44 : 139,247.73 = 55,581.63 : x
  2. Step 2: Convert to fraction form
    100,903.44/139,247.73 = 55,581.63/x
  3. Step 3: Cross multiply
    100,903.44x = 139,247.73 × 55,581.63
  4. Step 4: Simplify right side
    100,903.44x = 7,739,615,807.20
  5. Step 5: Solve for x
    x = 7,739,615,807.20/100,903.44
  6. Step 6: Final answer
    x = 76,703.19

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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.