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Finding the Fourth Proportional to 85,477.60, 128,216.40 and 41,190.85

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Solution

The fourth proportional to 85,477.60, 128,216.40 and 41,190.85 is: 61,786.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,477.60 : 128,216.40 = 41,190.85 : x
  2. Step 2: Convert to fraction form
    85,477.60/128,216.40 = 41,190.85/x
  3. Step 3: Cross multiply
    85,477.60x = 128,216.40 × 41,190.85
  4. Step 4: Simplify right side
    85,477.60x = 5,281,342,499.94
  5. Step 5: Solve for x
    x = 5,281,342,499.94/85,477.60
  6. Step 6: Final answer
    x = 61,786.28

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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.