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Finding the Fourth Proportional to 72,336.51, 99,826.16 and 40,511.88

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Solution

The fourth proportional to 72,336.51, 99,826.16 and 40,511.88 is: 55,907.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,336.51 : 99,826.16 = 40,511.88 : x
  2. Step 2: Convert to fraction form
    72,336.51/99,826.16 = 40,511.88/x
  3. Step 3: Cross multiply
    72,336.51x = 99,826.16 × 40,511.88
  4. Step 4: Simplify right side
    72,336.51x = 4,044,145,212.22
  5. Step 5: Solve for x
    x = 4,044,145,212.22/72,336.51
  6. Step 6: Final answer
    x = 55,907.39

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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.