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Finding the Fourth Proportional to 72,068.94, 108,009.36 and 52,145.54

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Solution

The fourth proportional to 72,068.94, 108,009.36 and 52,145.54 is: 78,150.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,068.94 : 108,009.36 = 52,145.54 : x
  2. Step 2: Convert to fraction form
    72,068.94/108,009.36 = 52,145.54/x
  3. Step 3: Cross multiply
    72,068.94x = 108,009.36 × 52,145.54
  4. Step 4: Simplify right side
    72,068.94x = 5,632,206,402.25
  5. Step 5: Solve for x
    x = 5,632,206,402.25/72,068.94
  6. Step 6: Final answer
    x = 78,150.26

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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.