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Finding the Fourth Proportional to 72,316.67, 108,317.07 and 30,068.64

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Solution

The fourth proportional to 72,316.67, 108,317.07 and 30,068.64 is: 45,037.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,316.67 : 108,317.07 = 30,068.64 : x
  2. Step 2: Convert to fraction form
    72,316.67/108,317.07 = 30,068.64/x
  3. Step 3: Cross multiply
    72,316.67x = 108,317.07 × 30,068.64
  4. Step 4: Simplify right side
    72,316.67x = 3,256,946,983.68
  5. Step 5: Solve for x
    x = 3,256,946,983.68/72,316.67
  6. Step 6: Final answer
    x = 45,037.30

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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.