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Finding the Fourth Proportional to 101,631.81, 140,300.66 and 71,443.01

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Solution

The fourth proportional to 101,631.81, 140,300.66 and 71,443.01 is: 98,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,631.81 : 140,300.66 = 71,443.01 : x
  2. Step 2: Convert to fraction form
    101,631.81/140,300.66 = 71,443.01/x
  3. Step 3: Cross multiply
    101,631.81x = 140,300.66 × 71,443.01
  4. Step 4: Simplify right side
    101,631.81x = 10,023,501,448.92
  5. Step 5: Solve for x
    x = 10,023,501,448.92/101,631.81
  6. Step 6: Final answer
    x = 98,625.63

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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.