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Finding the Fourth Proportional to 100,940.48, 139,296.48 and 56,228.48

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Solution

The fourth proportional to 100,940.48, 139,296.48 and 56,228.48 is: 77,594.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,940.48 : 139,296.48 = 56,228.48 : x
  2. Step 2: Convert to fraction form
    100,940.48/139,296.48 = 56,228.48/x
  3. Step 3: Cross multiply
    100,940.48x = 139,296.48 × 56,228.48
  4. Step 4: Simplify right side
    100,940.48x = 7,832,429,339.75
  5. Step 5: Solve for x
    x = 7,832,429,339.75/100,940.48
  6. Step 6: Final answer
    x = 77,594.53

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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.