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Finding the Fourth Proportional to 139,302.60, 208,810.92 and 55,028.64

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Solution

The fourth proportional to 139,302.60, 208,810.92 and 55,028.64 is: 82,486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,302.60 : 208,810.92 = 55,028.64 : x
  2. Step 2: Convert to fraction form
    139,302.60/208,810.92 = 55,028.64/x
  3. Step 3: Cross multiply
    139,302.60x = 208,810.92 × 55,028.64
  4. Step 4: Simplify right side
    139,302.60x = 11,490,580,944.75
  5. Step 5: Solve for x
    x = 11,490,580,944.75/139,302.60
  6. Step 6: Final answer
    x = 82,486.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.