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Finding the Fourth Proportional to 70,605.49, 105,959.22 and 40,983.79

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Solution

The fourth proportional to 70,605.49, 105,959.22 and 40,983.79 is: 61,505.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,605.49 : 105,959.22 = 40,983.79 : x
  2. Step 2: Convert to fraction form
    70,605.49/105,959.22 = 40,983.79/x
  3. Step 3: Cross multiply
    70,605.49x = 105,959.22 × 40,983.79
  4. Step 4: Simplify right side
    70,605.49x = 4,342,610,421.04
  5. Step 5: Solve for x
    x = 4,342,610,421.04/70,605.49
  6. Step 6: Final answer
    x = 61,505.28

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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.