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Finding the Fourth Proportional to 70,916.68, 97,865.70 and 39,086.80

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Solution

The fourth proportional to 70,916.68, 97,865.70 and 39,086.80 is: 53,940.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,916.68 : 97,865.70 = 39,086.80 : x
  2. Step 2: Convert to fraction form
    70,916.68/97,865.70 = 39,086.80/x
  3. Step 3: Cross multiply
    70,916.68x = 97,865.70 × 39,086.80
  4. Step 4: Simplify right side
    70,916.68x = 3,825,257,042.76
  5. Step 5: Solve for x
    x = 3,825,257,042.76/70,916.68
  6. Step 6: Final answer
    x = 53,940.16

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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.