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Finding the Fourth Proportional to 66,505.84, 91,703.64 and 54,368.44

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Solution

The fourth proportional to 66,505.84, 91,703.64 and 54,368.44 is: 74,967.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.84 : 91,703.64 = 54,368.44 : x
  2. Step 2: Convert to fraction form
    66,505.84/91,703.64 = 54,368.44/x
  3. Step 3: Cross multiply
    66,505.84x = 91,703.64 × 54,368.44
  4. Step 4: Simplify right side
    66,505.84x = 4,985,783,849.12
  5. Step 5: Solve for x
    x = 4,985,783,849.12/66,505.84
  6. Step 6: Final answer
    x = 74,967.61

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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.