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Finding the Fourth Proportional to 107,759.36, 148,776 and 79,415.68

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Solution

The fourth proportional to 107,759.36, 148,776 and 79,415.68 is: 109,643.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,759.36 : 148,776 = 79,415.68 : x
  2. Step 2: Convert to fraction form
    107,759.36/148,776 = 79,415.68/x
  3. Step 3: Cross multiply
    107,759.36x = 148,776 × 79,415.68
  4. Step 4: Simplify right side
    107,759.36x = 11,815,147,207.68
  5. Step 5: Solve for x
    x = 11,815,147,207.68/107,759.36
  6. Step 6: Final answer
    x = 109,643.81

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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.