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Finding the Fourth Proportional to 113,698.80, 170,688.60 and 71,578.80

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Solution

The fourth proportional to 113,698.80, 170,688.60 and 71,578.80 is: 107,456.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,698.80 : 170,688.60 = 71,578.80 : x
  2. Step 2: Convert to fraction form
    113,698.80/170,688.60 = 71,578.80/x
  3. Step 3: Cross multiply
    113,698.80x = 170,688.60 × 71,578.80
  4. Step 4: Simplify right side
    113,698.80x = 12,217,685,161.68
  5. Step 5: Solve for x
    x = 12,217,685,161.68/113,698.80
  6. Step 6: Final answer
    x = 107,456.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.