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Finding the Fourth Proportional to 72,316.92, 108,317.44 and 30,068.89

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Solution

The fourth proportional to 72,316.92, 108,317.44 and 30,068.89 is: 45,037.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,316.92 : 108,317.44 = 30,068.89 : x
  2. Step 2: Convert to fraction form
    72,316.92/108,317.44 = 30,068.89/x
  3. Step 3: Cross multiply
    72,316.92x = 108,317.44 × 30,068.89
  4. Step 4: Simplify right side
    72,316.92x = 3,256,985,188.44
  5. Step 5: Solve for x
    x = 3,256,985,188.44/72,316.92
  6. Step 6: Final answer
    x = 45,037.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.