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Finding the Fourth Proportional to 67,708.70, 101,563.05 and 66,412.70

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Solution

The fourth proportional to 67,708.70, 101,563.05 and 66,412.70 is: 99,619.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,708.70 : 101,563.05 = 66,412.70 : x
  2. Step 2: Convert to fraction form
    67,708.70/101,563.05 = 66,412.70/x
  3. Step 3: Cross multiply
    67,708.70x = 101,563.05 × 66,412.70
  4. Step 4: Simplify right side
    67,708.70x = 6,745,076,370.74
  5. Step 5: Solve for x
    x = 6,745,076,370.74/67,708.70
  6. Step 6: Final answer
    x = 99,619.05

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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.