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Finding the Fourth Proportional to 100,404.48, 138,558.32 and 55,692.48

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Solution

The fourth proportional to 100,404.48, 138,558.32 and 55,692.48 is: 76,855.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,404.48 : 138,558.32 = 55,692.48 : x
  2. Step 2: Convert to fraction form
    100,404.48/138,558.32 = 55,692.48/x
  3. Step 3: Cross multiply
    100,404.48x = 138,558.32 × 55,692.48
  4. Step 4: Simplify right side
    100,404.48x = 7,716,656,465.43
  5. Step 5: Solve for x
    x = 7,716,656,465.43/100,404.48
  6. Step 6: Final answer
    x = 76,855.70

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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.