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Finding the Fourth Proportional to 272,215.63, 408,322.05 and 69,810.81

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Solution

The fourth proportional to 272,215.63, 408,322.05 and 69,810.81 is: 104,715.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,215.63 : 408,322.05 = 69,810.81 : x
  2. Step 2: Convert to fraction form
    272,215.63/408,322.05 = 69,810.81/x
  3. Step 3: Cross multiply
    272,215.63x = 408,322.05 × 69,810.81
  4. Step 4: Simplify right side
    272,215.63x = 28,505,293,051.36
  5. Step 5: Solve for x
    x = 28,505,293,051.36/272,215.63
  6. Step 6: Final answer
    x = 104,715.86

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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.