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Finding the Fourth Proportional to 73,020.56, 100,789.92 and 42,812.40

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Solution

The fourth proportional to 73,020.56, 100,789.92 and 42,812.40 is: 59,093.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,020.56 : 100,789.92 = 42,812.40 : x
  2. Step 2: Convert to fraction form
    73,020.56/100,789.92 = 42,812.40/x
  3. Step 3: Cross multiply
    73,020.56x = 100,789.92 × 42,812.40
  4. Step 4: Simplify right side
    73,020.56x = 4,315,058,371.01
  5. Step 5: Solve for x
    x = 4,315,058,371.01/73,020.56
  6. Step 6: Final answer
    x = 59,093.75

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1.5x scale

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.