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Finding the Fourth Proportional to 100,961.94, 139,322.49 and 58,534.26

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Solution

The fourth proportional to 100,961.94, 139,322.49 and 58,534.26 is: 80,774.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.94 : 139,322.49 = 58,534.26 : x
  2. Step 2: Convert to fraction form
    100,961.94/139,322.49 = 58,534.26/x
  3. Step 3: Cross multiply
    100,961.94x = 139,322.49 × 58,534.26
  4. Step 4: Simplify right side
    100,961.94x = 8,155,138,853.51
  5. Step 5: Solve for x
    x = 8,155,138,853.51/100,961.94
  6. Step 6: Final answer
    x = 80,774.39

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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.