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Finding the Fourth Proportional to 203,915.36, 305,938.08 and 85,554.92

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Solution

The fourth proportional to 203,915.36, 305,938.08 and 85,554.92 is: 128,359.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,915.36 : 305,938.08 = 85,554.92 : x
  2. Step 2: Convert to fraction form
    203,915.36/305,938.08 = 85,554.92/x
  3. Step 3: Cross multiply
    203,915.36x = 305,938.08 × 85,554.92
  4. Step 4: Simplify right side
    203,915.36x = 26,174,507,959.35
  5. Step 5: Solve for x
    x = 26,174,507,959.35/203,915.36
  6. Step 6: Final answer
    x = 128,359.67

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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.