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Finding the Fourth Proportional to 85,662.39, 128,419.68 and 41,228.01

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Solution

The fourth proportional to 85,662.39, 128,419.68 and 41,228.01 is: 61,806.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,662.39 : 128,419.68 = 41,228.01 : x
  2. Step 2: Convert to fraction form
    85,662.39/128,419.68 = 41,228.01/x
  3. Step 3: Cross multiply
    85,662.39x = 128,419.68 × 41,228.01
  4. Step 4: Simplify right side
    85,662.39x = 5,294,487,851.24
  5. Step 5: Solve for x
    x = 5,294,487,851.24/85,662.39
  6. Step 6: Final answer
    x = 61,806.45

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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.