Home / 123,905.36-185,739-79,407.44

Finding the Fourth Proportional to 123,905.36, 185,739 and 79,407.44

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Solution

The fourth proportional to 123,905.36, 185,739 and 79,407.44 is: 119,034.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,905.36 : 185,739 = 79,407.44 : x
  2. Step 2: Convert to fraction form
    123,905.36/185,739 = 79,407.44/x
  3. Step 3: Cross multiply
    123,905.36x = 185,739 × 79,407.44
  4. Step 4: Simplify right side
    123,905.36x = 14,749,058,498.16
  5. Step 5: Solve for x
    x = 14,749,058,498.16/123,905.36
  6. Step 6: Final answer
    x = 119,034.87

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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.