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Finding the Fourth Proportional to 100,817.82, 139,123.53 and 55,494.68

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Solution

The fourth proportional to 100,817.82, 139,123.53 and 55,494.68 is: 76,579.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,817.82 : 139,123.53 = 55,494.68 : x
  2. Step 2: Convert to fraction form
    100,817.82/139,123.53 = 55,494.68/x
  3. Step 3: Cross multiply
    100,817.82x = 139,123.53 × 55,494.68
  4. Step 4: Simplify right side
    100,817.82x = 7,720,615,082.20
  5. Step 5: Solve for x
    x = 7,720,615,082.20/100,817.82
  6. Step 6: Final answer
    x = 76,579.87

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1.5x scale

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.