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Finding the Fourth Proportional to 86,609.56, 130,121.70 and 55,505.56

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Solution

The fourth proportional to 86,609.56, 130,121.70 and 55,505.56 is: 83,391.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,609.56 : 130,121.70 = 55,505.56 : x
  2. Step 2: Convert to fraction form
    86,609.56/130,121.70 = 55,505.56/x
  3. Step 3: Cross multiply
    86,609.56x = 130,121.70 × 55,505.56
  4. Step 4: Simplify right side
    86,609.56x = 7,222,477,826.65
  5. Step 5: Solve for x
    x = 7,222,477,826.65/86,609.56
  6. Step 6: Final answer
    x = 83,391.23

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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.