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Finding the Fourth Proportional to 85,410.64, 128,139.45 and 41,074.48

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Solution

The fourth proportional to 85,410.64, 128,139.45 and 41,074.48 is: 61,623.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.64 : 128,139.45 = 41,074.48 : x
  2. Step 2: Convert to fraction form
    85,410.64/128,139.45 = 41,074.48/x
  3. Step 3: Cross multiply
    85,410.64x = 128,139.45 × 41,074.48
  4. Step 4: Simplify right side
    85,410.64x = 5,263,261,276.24
  5. Step 5: Solve for x
    x = 5,263,261,276.24/85,410.64
  6. Step 6: Final answer
    x = 61,623.02

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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.