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Finding the Fourth Proportional to 70,905.21, 97,847.93 and 38,640.12

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Solution

The fourth proportional to 70,905.21, 97,847.93 and 38,640.12 is: 53,322.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,905.21 : 97,847.93 = 38,640.12 : x
  2. Step 2: Convert to fraction form
    70,905.21/97,847.93 = 38,640.12/x
  3. Step 3: Cross multiply
    70,905.21x = 97,847.93 × 38,640.12
  4. Step 4: Simplify right side
    70,905.21x = 3,780,855,756.95
  5. Step 5: Solve for x
    x = 3,780,855,756.95/70,905.21
  6. Step 6: Final answer
    x = 53,322.68

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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.