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Finding the Fourth Proportional to 70,391.52, 97,139.88 and 38,559.78

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Solution

The fourth proportional to 70,391.52, 97,139.88 and 38,559.78 is: 53,212.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.52 : 97,139.88 = 38,559.78 : x
  2. Step 2: Convert to fraction form
    70,391.52/97,139.88 = 38,559.78/x
  3. Step 3: Cross multiply
    70,391.52x = 97,139.88 × 38,559.78
  4. Step 4: Simplify right side
    70,391.52x = 3,745,692,402.03
  5. Step 5: Solve for x
    x = 3,745,692,402.03/70,391.52
  6. Step 6: Final answer
    x = 53,212.27

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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.