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Finding the Fourth Proportional to 85,900.40, 128,877.60 and 41,528.60

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Solution

The fourth proportional to 85,900.40, 128,877.60 and 41,528.60 is: 62,305.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,900.40 : 128,877.60 = 41,528.60 : x
  2. Step 2: Convert to fraction form
    85,900.40/128,877.60 = 41,528.60/x
  3. Step 3: Cross multiply
    85,900.40x = 128,877.60 × 41,528.60
  4. Step 4: Simplify right side
    85,900.40x = 5,352,106,299.36
  5. Step 5: Solve for x
    x = 5,352,106,299.36/85,900.40
  6. Step 6: Final answer
    x = 62,305.95

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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.