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Finding the Fourth Proportional to 103,130.20, 154,709.70 and 43,965.40

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Solution

The fourth proportional to 103,130.20, 154,709.70 and 43,965.40 is: 65,954.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,130.20 : 154,709.70 = 43,965.40 : x
  2. Step 2: Convert to fraction form
    103,130.20/154,709.70 = 43,965.40/x
  3. Step 3: Cross multiply
    103,130.20x = 154,709.70 × 43,965.40
  4. Step 4: Simplify right side
    103,130.20x = 6,801,873,844.38
  5. Step 5: Solve for x
    x = 6,801,873,844.38/103,130.20
  6. Step 6: Final answer
    x = 65,954.24

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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.