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Finding the Fourth Proportional to 66,240, 91,411.44 and 36,025.32

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Solution

The fourth proportional to 66,240, 91,411.44 and 36,025.32 is: 49,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,240 : 91,411.44 = 36,025.32 : x
  2. Step 2: Convert to fraction form
    66,240/91,411.44 = 36,025.32/x
  3. Step 3: Cross multiply
    66,240x = 91,411.44 × 36,025.32
  4. Step 4: Simplify right side
    66,240x = 3,293,126,377.66
  5. Step 5: Solve for x
    x = 3,293,126,377.66/66,240
  6. Step 6: Final answer
    x = 49,715.07

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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.