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Finding the Fourth Proportional to 78,953.70, 108,954.79 and 43,142.89

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Solution

The fourth proportional to 78,953.70, 108,954.79 and 43,142.89 is: 59,536.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.70 : 108,954.79 = 43,142.89 : x
  2. Step 2: Convert to fraction form
    78,953.70/108,954.79 = 43,142.89/x
  3. Step 3: Cross multiply
    78,953.70x = 108,954.79 × 43,142.89
  4. Step 4: Simplify right side
    78,953.70x = 4,700,624,519.94
  5. Step 5: Solve for x
    x = 4,700,624,519.94/78,953.70
  6. Step 6: Final answer
    x = 59,536.47

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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.