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Finding the Fourth Proportional to 66,368.58, 91,582.56 and 39,517.62

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Solution

The fourth proportional to 66,368.58, 91,582.56 and 39,517.62 is: 54,530.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,368.58 : 91,582.56 = 39,517.62 : x
  2. Step 2: Convert to fraction form
    66,368.58/91,582.56 = 39,517.62/x
  3. Step 3: Cross multiply
    66,368.58x = 91,582.56 × 39,517.62
  4. Step 4: Simplify right side
    66,368.58x = 3,619,124,804.71
  5. Step 5: Solve for x
    x = 3,619,124,804.71/66,368.58
  6. Step 6: Final answer
    x = 54,530.70

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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.