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Finding the Fourth Proportional to 170,840.40, 256,260.60 and 65,661.90

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Solution

The fourth proportional to 170,840.40, 256,260.60 and 65,661.90 is: 98,492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,840.40 : 256,260.60 = 65,661.90 : x
  2. Step 2: Convert to fraction form
    170,840.40/256,260.60 = 65,661.90/x
  3. Step 3: Cross multiply
    170,840.40x = 256,260.60 × 65,661.90
  4. Step 4: Simplify right side
    170,840.40x = 16,826,557,891.14
  5. Step 5: Solve for x
    x = 16,826,557,891.14/170,840.40
  6. Step 6: Final answer
    x = 98,492.85

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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.