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Finding the Fourth Proportional to 70,731.54, 97,610.67 and 38,900.16

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Solution

The fourth proportional to 70,731.54, 97,610.67 and 38,900.16 is: 53,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,731.54 : 97,610.67 = 38,900.16 : x
  2. Step 2: Convert to fraction form
    70,731.54/97,610.67 = 38,900.16/x
  3. Step 3: Cross multiply
    70,731.54x = 97,610.67 × 38,900.16
  4. Step 4: Simplify right side
    70,731.54x = 3,797,070,680.71
  5. Step 5: Solve for x
    x = 3,797,070,680.71/70,731.54
  6. Step 6: Final answer
    x = 53,682.85

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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.