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Finding the Fourth Proportional to 111,638.70, 154,058.22 and 60,649.20

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Solution

The fourth proportional to 111,638.70, 154,058.22 and 60,649.20 is: 83,694.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,638.70 : 154,058.22 = 60,649.20 : x
  2. Step 2: Convert to fraction form
    111,638.70/154,058.22 = 60,649.20/x
  3. Step 3: Cross multiply
    111,638.70x = 154,058.22 × 60,649.20
  4. Step 4: Simplify right side
    111,638.70x = 9,343,507,796.42
  5. Step 5: Solve for x
    x = 9,343,507,796.42/111,638.70
  6. Step 6: Final answer
    x = 83,694.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.