Home / 81,985.16-113,147.57-47,991.60

Finding the Fourth Proportional to 81,985.16, 113,147.57 and 47,991.60

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Solution

The fourth proportional to 81,985.16, 113,147.57 and 47,991.60 is: 66,233.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,985.16 : 113,147.57 = 47,991.60 : x
  2. Step 2: Convert to fraction form
    81,985.16/113,147.57 = 47,991.60/x
  3. Step 3: Cross multiply
    81,985.16x = 113,147.57 × 47,991.60
  4. Step 4: Simplify right side
    81,985.16x = 5,430,133,040.39
  5. Step 5: Solve for x
    x = 5,430,133,040.39/81,985.16
  6. Step 6: Final answer
    x = 66,233.12

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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.