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Finding the Fourth Proportional to 61,538.54, 84,866.82 and 40,329.50

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Solution

The fourth proportional to 61,538.54, 84,866.82 and 40,329.50 is: 55,617.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,538.54 : 84,866.82 = 40,329.50 : x
  2. Step 2: Convert to fraction form
    61,538.54/84,866.82 = 40,329.50/x
  3. Step 3: Cross multiply
    61,538.54x = 84,866.82 × 40,329.50
  4. Step 4: Simplify right side
    61,538.54x = 3,422,636,417.19
  5. Step 5: Solve for x
    x = 3,422,636,417.19/61,538.54
  6. Step 6: Final answer
    x = 55,617.77

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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.