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Finding the Fourth Proportional to 170,745.40, 256,118.10 and 82,041.40

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Solution

The fourth proportional to 170,745.40, 256,118.10 and 82,041.40 is: 123,062.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,745.40 : 256,118.10 = 82,041.40 : x
  2. Step 2: Convert to fraction form
    170,745.40/256,118.10 = 82,041.40/x
  3. Step 3: Cross multiply
    170,745.40x = 256,118.10 × 82,041.40
  4. Step 4: Simplify right side
    170,745.40x = 21,012,287,489.34
  5. Step 5: Solve for x
    x = 21,012,287,489.34/170,745.40
  6. Step 6: Final answer
    x = 123,062.10

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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.