Home / 61,106.16-91,665-18,986.70

Finding the Fourth Proportional to 61,106.16, 91,665 and 18,986.70

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Solution

The fourth proportional to 61,106.16, 91,665 and 18,986.70 is: 28,481.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,106.16 : 91,665 = 18,986.70 : x
  2. Step 2: Convert to fraction form
    61,106.16/91,665 = 18,986.70/x
  3. Step 3: Cross multiply
    61,106.16x = 91,665 × 18,986.70
  4. Step 4: Simplify right side
    61,106.16x = 1,740,415,855.50
  5. Step 5: Solve for x
    x = 1,740,415,855.50/61,106.16
  6. Step 6: Final answer
    x = 28,481.84

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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.