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Finding the Fourth Proportional to 67,980.69, 101,986.83 and 66,851.01

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Solution

The fourth proportional to 67,980.69, 101,986.83 and 66,851.01 is: 100,292.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,980.69 : 101,986.83 = 66,851.01 : x
  2. Step 2: Convert to fraction form
    67,980.69/101,986.83 = 66,851.01/x
  3. Step 3: Cross multiply
    67,980.69x = 101,986.83 × 66,851.01
  4. Step 4: Simplify right side
    67,980.69x = 6,817,922,592.20
  5. Step 5: Solve for x
    x = 6,817,922,592.20/67,980.69
  6. Step 6: Final answer
    x = 100,292.05

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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.