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Finding the Fourth Proportional to 40,643.47, 55,963.35 and 35,579.35

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Solution

The fourth proportional to 40,643.47, 55,963.35 and 35,579.35 is: 48,990.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,643.47 : 55,963.35 = 35,579.35 : x
  2. Step 2: Convert to fraction form
    40,643.47/55,963.35 = 35,579.35/x
  3. Step 3: Cross multiply
    40,643.47x = 55,963.35 × 35,579.35
  4. Step 4: Simplify right side
    40,643.47x = 1,991,139,616.82
  5. Step 5: Solve for x
    x = 1,991,139,616.82/40,643.47
  6. Step 6: Final answer
    x = 48,990.39

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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.