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Finding the Fourth Proportional to 67,409.54, 101,129.07 and 20,666.06

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Solution

The fourth proportional to 67,409.54, 101,129.07 and 20,666.06 is: 31,003.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,409.54 : 101,129.07 = 20,666.06 : x
  2. Step 2: Convert to fraction form
    67,409.54/101,129.07 = 20,666.06/x
  3. Step 3: Cross multiply
    67,409.54x = 101,129.07 × 20,666.06
  4. Step 4: Simplify right side
    67,409.54x = 2,089,939,428.36
  5. Step 5: Solve for x
    x = 2,089,939,428.36/67,409.54
  6. Step 6: Final answer
    x = 31,003.62

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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.