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Finding the Fourth Proportional to 72,309.34, 108,630.51 and 51,301.54

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Solution

The fourth proportional to 72,309.34, 108,630.51 and 51,301.54 is: 77,070.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,309.34 : 108,630.51 = 51,301.54 : x
  2. Step 2: Convert to fraction form
    72,309.34/108,630.51 = 51,301.54/x
  3. Step 3: Cross multiply
    72,309.34x = 108,630.51 × 51,301.54
  4. Step 4: Simplify right side
    72,309.34x = 5,572,912,453.99
  5. Step 5: Solve for x
    x = 5,572,912,453.99/72,309.34
  6. Step 6: Final answer
    x = 77,070.44

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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.