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Finding the Fourth Proportional to 85,900.56, 128,889.20 and 33,314.16

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Solution

The fourth proportional to 85,900.56, 128,889.20 and 33,314.16 is: 49,986.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,900.56 : 128,889.20 = 33,314.16 : x
  2. Step 2: Convert to fraction form
    85,900.56/128,889.20 = 33,314.16/x
  3. Step 3: Cross multiply
    85,900.56x = 128,889.20 × 33,314.16
  4. Step 4: Simplify right side
    85,900.56x = 4,293,835,431.07
  5. Step 5: Solve for x
    x = 4,293,835,431.07/85,900.56
  6. Step 6: Final answer
    x = 49,986.12

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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.