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Finding the Fourth Proportional to 171,317.93, 256,986.97 and 66,137.45

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Solution

The fourth proportional to 171,317.93, 256,986.97 and 66,137.45 is: 99,210.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,317.93 : 256,986.97 = 66,137.45 : x
  2. Step 2: Convert to fraction form
    171,317.93/256,986.97 = 66,137.45/x
  3. Step 3: Cross multiply
    171,317.93x = 256,986.97 × 66,137.45
  4. Step 4: Simplify right side
    171,317.93x = 16,996,461,428.75
  5. Step 5: Solve for x
    x = 16,996,461,428.75/171,317.93
  6. Step 6: Final answer
    x = 99,210.06

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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.