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Finding the Fourth Proportional to 66,157.51, 91,311.81 and 40,685.79

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Solution

The fourth proportional to 66,157.51, 91,311.81 and 40,685.79 is: 56,155.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,157.51 : 91,311.81 = 40,685.79 : x
  2. Step 2: Convert to fraction form
    66,157.51/91,311.81 = 40,685.79/x
  3. Step 3: Cross multiply
    66,157.51x = 91,311.81 × 40,685.79
  4. Step 4: Simplify right side
    66,157.51x = 3,715,093,316.03
  5. Step 5: Solve for x
    x = 3,715,093,316.03/66,157.51
  6. Step 6: Final answer
    x = 56,155.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.