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Finding the Fourth Proportional to 73,991.63, 102,108.66 and 47,128.39

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Solution

The fourth proportional to 73,991.63, 102,108.66 and 47,128.39 is: 65,037.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,991.63 : 102,108.66 = 47,128.39 : x
  2. Step 2: Convert to fraction form
    73,991.63/102,108.66 = 47,128.39/x
  3. Step 3: Cross multiply
    73,991.63x = 102,108.66 × 47,128.39
  4. Step 4: Simplify right side
    73,991.63x = 4,812,216,495.59
  5. Step 5: Solve for x
    x = 4,812,216,495.59/73,991.63
  6. Step 6: Final answer
    x = 65,037.31

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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.