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Finding the Fourth Proportional to 70,943.69, 97,900.93 and 38,678.65

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Solution

The fourth proportional to 70,943.69, 97,900.93 and 38,678.65 is: 53,375.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,943.69 : 97,900.93 = 38,678.65 : x
  2. Step 2: Convert to fraction form
    70,943.69/97,900.93 = 38,678.65/x
  3. Step 3: Cross multiply
    70,943.69x = 97,900.93 × 38,678.65
  4. Step 4: Simplify right side
    70,943.69x = 3,786,675,806.14
  5. Step 5: Solve for x
    x = 3,786,675,806.14/70,943.69
  6. Step 6: Final answer
    x = 53,375.79

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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.