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Finding the Fourth Proportional to 100,947.38, 139,310.26 and 56,238.26

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Solution

The fourth proportional to 100,947.38, 139,310.26 and 56,238.26 is: 77,610.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,947.38 : 139,310.26 = 56,238.26 : x
  2. Step 2: Convert to fraction form
    100,947.38/139,310.26 = 56,238.26/x
  3. Step 3: Cross multiply
    100,947.38x = 139,310.26 × 56,238.26
  4. Step 4: Simplify right side
    100,947.38x = 7,834,565,785.40
  5. Step 5: Solve for x
    x = 7,834,565,785.40/100,947.38
  6. Step 6: Final answer
    x = 77,610.40

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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.