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Finding the Fourth Proportional to 73,072.32, 100,840.16 and 39,538.40

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Solution

The fourth proportional to 73,072.32, 100,840.16 and 39,538.40 is: 54,563.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,072.32 : 100,840.16 = 39,538.40 : x
  2. Step 2: Convert to fraction form
    73,072.32/100,840.16 = 39,538.40/x
  3. Step 3: Cross multiply
    73,072.32x = 100,840.16 × 39,538.40
  4. Step 4: Simplify right side
    73,072.32x = 3,987,058,582.14
  5. Step 5: Solve for x
    x = 3,987,058,582.14/73,072.32
  6. Step 6: Final answer
    x = 54,563.19

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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.