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Finding the Fourth Proportional to 85,503.68, 117,942.72 and 55,239.92

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Solution

The fourth proportional to 85,503.68, 117,942.72 and 55,239.92 is: 76,197.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,503.68 : 117,942.72 = 55,239.92 : x
  2. Step 2: Convert to fraction form
    85,503.68/117,942.72 = 55,239.92/x
  3. Step 3: Cross multiply
    85,503.68x = 117,942.72 × 55,239.92
  4. Step 4: Simplify right side
    85,503.68x = 6,515,146,417.38
  5. Step 5: Solve for x
    x = 6,515,146,417.38/85,503.68
  6. Step 6: Final answer
    x = 76,197.26

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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.