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Finding the Fourth Proportional to 43,378, 64,702.37 and 39,391.59

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Solution

The fourth proportional to 43,378, 64,702.37 and 39,391.59 is: 58,756.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,378 : 64,702.37 = 39,391.59 : x
  2. Step 2: Convert to fraction form
    43,378/64,702.37 = 39,391.59/x
  3. Step 3: Cross multiply
    43,378x = 64,702.37 × 39,391.59
  4. Step 4: Simplify right side
    43,378x = 2,548,728,809.08
  5. Step 5: Solve for x
    x = 2,548,728,809.08/43,378
  6. Step 6: Final answer
    x = 58,756.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.