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Finding the Fourth Proportional to 57,638.76, 79,607.08 and 38,743.08

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Solution

The fourth proportional to 57,638.76, 79,607.08 and 38,743.08 is: 53,509.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,638.76 : 79,607.08 = 38,743.08 : x
  2. Step 2: Convert to fraction form
    57,638.76/79,607.08 = 38,743.08/x
  3. Step 3: Cross multiply
    57,638.76x = 79,607.08 × 38,743.08
  4. Step 4: Simplify right side
    57,638.76x = 3,084,223,469.01
  5. Step 5: Solve for x
    x = 3,084,223,469.01/57,638.76
  6. Step 6: Final answer
    x = 53,509.54

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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.