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Finding the Fourth Proportional to 100,955.32, 139,260.54 and 63,163.96

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Solution

The fourth proportional to 100,955.32, 139,260.54 and 63,163.96 is: 87,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,955.32 : 139,260.54 = 63,163.96 : x
  2. Step 2: Convert to fraction form
    100,955.32/139,260.54 = 63,163.96/x
  3. Step 3: Cross multiply
    100,955.32x = 139,260.54 × 63,163.96
  4. Step 4: Simplify right side
    100,955.32x = 8,796,247,178.14
  5. Step 5: Solve for x
    x = 8,796,247,178.14/100,955.32
  6. Step 6: Final answer
    x = 87,130.10

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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.