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Finding the Fourth Proportional to 70,458.53, 105,687.57 and 17,867.89

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Solution

The fourth proportional to 70,458.53, 105,687.57 and 17,867.89 is: 26,801.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,458.53 : 105,687.57 = 17,867.89 : x
  2. Step 2: Convert to fraction form
    70,458.53/105,687.57 = 17,867.89/x
  3. Step 3: Cross multiply
    70,458.53x = 105,687.57 × 17,867.89
  4. Step 4: Simplify right side
    70,458.53x = 1,888,413,346.69
  5. Step 5: Solve for x
    x = 1,888,413,346.69/70,458.53
  6. Step 6: Final answer
    x = 26,801.77

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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.