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Finding the Fourth Proportional to 43,309.80, 64,964.70 and 40,685.40

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Solution

The fourth proportional to 43,309.80, 64,964.70 and 40,685.40 is: 61,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,309.80 : 64,964.70 = 40,685.40 : x
  2. Step 2: Convert to fraction form
    43,309.80/64,964.70 = 40,685.40/x
  3. Step 3: Cross multiply
    43,309.80x = 64,964.70 × 40,685.40
  4. Step 4: Simplify right side
    43,309.80x = 2,643,114,805.38
  5. Step 5: Solve for x
    x = 2,643,114,805.38/43,309.80
  6. Step 6: Final answer
    x = 61,028.10

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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.