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Finding the Fourth Proportional to 70,912.64, 97,858.94 and 39,081.57

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Solution

The fourth proportional to 70,912.64, 97,858.94 and 39,081.57 is: 53,932.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.64 : 97,858.94 = 39,081.57 : x
  2. Step 2: Convert to fraction form
    70,912.64/97,858.94 = 39,081.57/x
  3. Step 3: Cross multiply
    70,912.64x = 97,858.94 × 39,081.57
  4. Step 4: Simplify right side
    70,912.64x = 3,824,480,818.33
  5. Step 5: Solve for x
    x = 3,824,480,818.33/70,912.64
  6. Step 6: Final answer
    x = 53,932.29

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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.