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Finding the Fourth Proportional to 91,119.69, 136,699.56 and 27,948.51

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Solution

The fourth proportional to 91,119.69, 136,699.56 and 27,948.51 is: 41,928.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,119.69 : 136,699.56 = 27,948.51 : x
  2. Step 2: Convert to fraction form
    91,119.69/136,699.56 = 27,948.51/x
  3. Step 3: Cross multiply
    91,119.69x = 136,699.56 × 27,948.51
  4. Step 4: Simplify right side
    91,119.69x = 3,820,549,019.66
  5. Step 5: Solve for x
    x = 3,820,549,019.66/91,119.69
  6. Step 6: Final answer
    x = 41,928.91

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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.