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Finding the Fourth Proportional to 89,384.40, 134,076.60 and 85,010.40

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Solution

The fourth proportional to 89,384.40, 134,076.60 and 85,010.40 is: 127,515.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,384.40 : 134,076.60 = 85,010.40 : x
  2. Step 2: Convert to fraction form
    89,384.40/134,076.60 = 85,010.40/x
  3. Step 3: Cross multiply
    89,384.40x = 134,076.60 × 85,010.40
  4. Step 4: Simplify right side
    89,384.40x = 11,397,905,396.64
  5. Step 5: Solve for x
    x = 11,397,905,396.64/89,384.40
  6. Step 6: Final answer
    x = 127,515.60

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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.