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Finding the Fourth Proportional to 61,427.76, 84,802.31 and 41,389.98

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Solution

The fourth proportional to 61,427.76, 84,802.31 and 41,389.98 is: 57,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,427.76 : 84,802.31 = 41,389.98 : x
  2. Step 2: Convert to fraction form
    61,427.76/84,802.31 = 41,389.98/x
  3. Step 3: Cross multiply
    61,427.76x = 84,802.31 × 41,389.98
  4. Step 4: Simplify right side
    61,427.76x = 3,509,965,914.85
  5. Step 5: Solve for x
    x = 3,509,965,914.85/61,427.76
  6. Step 6: Final answer
    x = 57,139.73

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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.