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Finding the Fourth Proportional to 270,607.72, 405,903.19 and 128,555.22

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Solution

The fourth proportional to 270,607.72, 405,903.19 and 128,555.22 is: 192,828.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,607.72 : 405,903.19 = 128,555.22 : x
  2. Step 2: Convert to fraction form
    270,607.72/405,903.19 = 128,555.22/x
  3. Step 3: Cross multiply
    270,607.72x = 405,903.19 × 128,555.22
  4. Step 4: Simplify right side
    270,607.72x = 52,180,973,889.15
  5. Step 5: Solve for x
    x = 52,180,973,889.15/270,607.72
  6. Step 6: Final answer
    x = 192,828.84

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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.