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Finding the Fourth Proportional to 101,396.88, 139,928.60 and 56,077.92

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Solution

The fourth proportional to 101,396.88, 139,928.60 and 56,077.92 is: 77,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,396.88 : 139,928.60 = 56,077.92 : x
  2. Step 2: Convert to fraction form
    101,396.88/139,928.60 = 56,077.92/x
  3. Step 3: Cross multiply
    101,396.88x = 139,928.60 × 56,077.92
  4. Step 4: Simplify right side
    101,396.88x = 7,846,904,836.51
  5. Step 5: Solve for x
    x = 7,846,904,836.51/101,396.88
  6. Step 6: Final answer
    x = 77,388.03

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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.