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Finding the Fourth Proportional to 73,139.22, 109,699.11 and 28,754.06

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Solution

The fourth proportional to 73,139.22, 109,699.11 and 28,754.06 is: 43,127.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.22 : 109,699.11 = 28,754.06 : x
  2. Step 2: Convert to fraction form
    73,139.22/109,699.11 = 28,754.06/x
  3. Step 3: Cross multiply
    73,139.22x = 109,699.11 × 28,754.06
  4. Step 4: Simplify right side
    73,139.22x = 3,154,294,242.39
  5. Step 5: Solve for x
    x = 3,154,294,242.39/73,139.22
  6. Step 6: Final answer
    x = 43,127.26

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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.