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Finding the Fourth Proportional to 101,135.10, 139,566.87 and 55,812.30

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Solution

The fourth proportional to 101,135.10, 139,566.87 and 55,812.30 is: 77,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,135.10 : 139,566.87 = 55,812.30 : x
  2. Step 2: Convert to fraction form
    101,135.10/139,566.87 = 55,812.30/x
  3. Step 3: Cross multiply
    101,135.10x = 139,566.87 × 55,812.30
  4. Step 4: Simplify right side
    101,135.10x = 7,789,548,018.50
  5. Step 5: Solve for x
    x = 7,789,548,018.50/101,135.10
  6. Step 6: Final answer
    x = 77,021.21

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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.