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Finding the Fourth Proportional to 70,448.58, 105,679.02 and 17,858.07

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Solution

The fourth proportional to 70,448.58, 105,679.02 and 17,858.07 is: 26,788.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,448.58 : 105,679.02 = 17,858.07 : x
  2. Step 2: Convert to fraction form
    70,448.58/105,679.02 = 17,858.07/x
  3. Step 3: Cross multiply
    70,448.58x = 105,679.02 × 17,858.07
  4. Step 4: Simplify right side
    70,448.58x = 1,887,223,336.69
  5. Step 5: Solve for x
    x = 1,887,223,336.69/70,448.58
  6. Step 6: Final answer
    x = 26,788.66

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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.