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Finding the Fourth Proportional to 103,864.59, 155,935.26 and 70,243.56

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Solution

The fourth proportional to 103,864.59, 155,935.26 and 70,243.56 is: 105,458.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,864.59 : 155,935.26 = 70,243.56 : x
  2. Step 2: Convert to fraction form
    103,864.59/155,935.26 = 70,243.56/x
  3. Step 3: Cross multiply
    103,864.59x = 155,935.26 × 70,243.56
  4. Step 4: Simplify right side
    103,864.59x = 10,953,447,791.93
  5. Step 5: Solve for x
    x = 10,953,447,791.93/103,864.59
  6. Step 6: Final answer
    x = 105,458.92

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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.