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Finding the Fourth Proportional to 43,391.28, 64,908.72 and 34,643.28

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Solution

The fourth proportional to 43,391.28, 64,908.72 and 34,643.28 is: 51,822.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,391.28 : 64,908.72 = 34,643.28 : x
  2. Step 2: Convert to fraction form
    43,391.28/64,908.72 = 34,643.28/x
  3. Step 3: Cross multiply
    43,391.28x = 64,908.72 × 34,643.28
  4. Step 4: Simplify right side
    43,391.28x = 2,248,650,961.40
  5. Step 5: Solve for x
    x = 2,248,650,961.40/43,391.28
  6. Step 6: Final answer
    x = 51,822.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.