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Finding the Fourth Proportional to 66,218.50, 91,381.53 and 37,926.01

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Solution

The fourth proportional to 66,218.50, 91,381.53 and 37,926.01 is: 52,337.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,218.50 : 91,381.53 = 37,926.01 : x
  2. Step 2: Convert to fraction form
    66,218.50/91,381.53 = 37,926.01/x
  3. Step 3: Cross multiply
    66,218.50x = 91,381.53 × 37,926.01
  4. Step 4: Simplify right side
    66,218.50x = 3,465,736,820.60
  5. Step 5: Solve for x
    x = 3,465,736,820.60/66,218.50
  6. Step 6: Final answer
    x = 52,337.89

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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.