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Finding the Fourth Proportional to 170,783.40, 256,079.10 and 65,605.80

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Solution

The fourth proportional to 170,783.40, 256,079.10 and 65,605.80 is: 98,371.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,783.40 : 256,079.10 = 65,605.80 : x
  2. Step 2: Convert to fraction form
    170,783.40/256,079.10 = 65,605.80/x
  3. Step 3: Cross multiply
    170,783.40x = 256,079.10 × 65,605.80
  4. Step 4: Simplify right side
    170,783.40x = 16,800,274,218.78
  5. Step 5: Solve for x
    x = 16,800,274,218.78/170,783.40
  6. Step 6: Final answer
    x = 98,371.82

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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.