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Finding the Fourth Proportional to 101,193.80, 139,643.64 and 55,870.79

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Solution

The fourth proportional to 101,193.80, 139,643.64 and 55,870.79 is: 77,099.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,193.80 : 139,643.64 = 55,870.79 : x
  2. Step 2: Convert to fraction form
    101,193.80/139,643.64 = 55,870.79/x
  3. Step 3: Cross multiply
    101,193.80x = 139,643.64 × 55,870.79
  4. Step 4: Simplify right side
    101,193.80x = 7,801,999,787.06
  5. Step 5: Solve for x
    x = 7,801,999,787.06/101,193.80
  6. Step 6: Final answer
    x = 77,099.59

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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.