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Finding the Fourth Proportional to 66,538.60, 91,838.70 and 43,881.64

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Solution

The fourth proportional to 66,538.60, 91,838.70 and 43,881.64 is: 60,566.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,538.60 : 91,838.70 = 43,881.64 : x
  2. Step 2: Convert to fraction form
    66,538.60/91,838.70 = 43,881.64/x
  3. Step 3: Cross multiply
    66,538.60x = 91,838.70 × 43,881.64
  4. Step 4: Simplify right side
    66,538.60x = 4,030,032,771.47
  5. Step 5: Solve for x
    x = 4,030,032,771.47/66,538.60
  6. Step 6: Final answer
    x = 60,566.84

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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.