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Finding the Fourth Proportional to 70,912.39, 97,858.60 and 39,081.31

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Solution

The fourth proportional to 70,912.39, 97,858.60 and 39,081.31 is: 53,931.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.39 : 97,858.60 = 39,081.31 : x
  2. Step 2: Convert to fraction form
    70,912.39/97,858.60 = 39,081.31/x
  3. Step 3: Cross multiply
    70,912.39x = 97,858.60 × 39,081.31
  4. Step 4: Simplify right side
    70,912.39x = 3,824,442,282.77
  5. Step 5: Solve for x
    x = 3,824,442,282.77/70,912.39
  6. Step 6: Final answer
    x = 53,931.93

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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.