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Finding the Fourth Proportional to 101,188, 139,639.44 and 56,476

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Solution

The fourth proportional to 101,188, 139,639.44 and 56,476 is: 77,936.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,188 : 139,639.44 = 56,476 : x
  2. Step 2: Convert to fraction form
    101,188/139,639.44 = 56,476/x
  3. Step 3: Cross multiply
    101,188x = 139,639.44 × 56,476
  4. Step 4: Simplify right side
    101,188x = 7,886,277,013.44
  5. Step 5: Solve for x
    x = 7,886,277,013.44/101,188
  6. Step 6: Final answer
    x = 77,936.88

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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.