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Finding the Fourth Proportional to 61,940, 85,478.76 and 33,645.68

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Solution

The fourth proportional to 61,940, 85,478.76 and 33,645.68 is: 46,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,940 : 85,478.76 = 33,645.68 : x
  2. Step 2: Convert to fraction form
    61,940/85,478.76 = 33,645.68/x
  3. Step 3: Cross multiply
    61,940x = 85,478.76 × 33,645.68
  4. Step 4: Simplify right side
    61,940x = 2,875,991,005.76
  5. Step 5: Solve for x
    x = 2,875,991,005.76/61,940
  6. Step 6: Final answer
    x = 46,431.89

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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.