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Finding the Fourth Proportional to 99,058.64, 136,583.88 and 81,087.44

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Solution

The fourth proportional to 99,058.64, 136,583.88 and 81,087.44 is: 111,804.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,058.64 : 136,583.88 = 81,087.44 : x
  2. Step 2: Convert to fraction form
    99,058.64/136,583.88 = 81,087.44/x
  3. Step 3: Cross multiply
    99,058.64x = 136,583.88 × 81,087.44
  4. Step 4: Simplify right side
    99,058.64x = 11,075,237,174.47
  5. Step 5: Solve for x
    x = 11,075,237,174.47/99,058.64
  6. Step 6: Final answer
    x = 111,804.86

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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.