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Finding the Fourth Proportional to 70,904.21, 97,846.56 and 38,639.12

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Solution

The fourth proportional to 70,904.21, 97,846.56 and 38,639.12 is: 53,321.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,904.21 : 97,846.56 = 38,639.12 : x
  2. Step 2: Convert to fraction form
    70,904.21/97,846.56 = 38,639.12/x
  3. Step 3: Cross multiply
    70,904.21x = 97,846.56 × 38,639.12
  4. Step 4: Simplify right side
    70,904.21x = 3,780,704,291.00
  5. Step 5: Solve for x
    x = 3,780,704,291.00/70,904.21
  6. Step 6: Final answer
    x = 53,321.29

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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.