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Finding the Fourth Proportional to 61,902.39, 85,477.64 and 39,281.52

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Solution

The fourth proportional to 61,902.39, 85,477.64 and 39,281.52 is: 54,241.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,902.39 : 85,477.64 = 39,281.52 : x
  2. Step 2: Convert to fraction form
    61,902.39/85,477.64 = 39,281.52/x
  3. Step 3: Cross multiply
    61,902.39x = 85,477.64 × 39,281.52
  4. Step 4: Simplify right side
    61,902.39x = 3,357,691,428.81
  5. Step 5: Solve for x
    x = 3,357,691,428.81/61,902.39
  6. Step 6: Final answer
    x = 54,241.71

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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.