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Finding the Fourth Proportional to 81,751.56, 112,847.99 and 47,771.10

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Solution

The fourth proportional to 81,751.56, 112,847.99 and 47,771.10 is: 65,942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,751.56 : 112,847.99 = 47,771.10 : x
  2. Step 2: Convert to fraction form
    81,751.56/112,847.99 = 47,771.10/x
  3. Step 3: Cross multiply
    81,751.56x = 112,847.99 × 47,771.10
  4. Step 4: Simplify right side
    81,751.56x = 5,390,871,900.16
  5. Step 5: Solve for x
    x = 5,390,871,900.16/81,751.56
  6. Step 6: Final answer
    x = 65,942.13

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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.