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Finding the Fourth Proportional to 91,860.51, 126,757.71 and 51,578.67

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Solution

The fourth proportional to 91,860.51, 126,757.71 and 51,578.67 is: 71,173.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,860.51 : 126,757.71 = 51,578.67 : x
  2. Step 2: Convert to fraction form
    91,860.51/126,757.71 = 51,578.67/x
  3. Step 3: Cross multiply
    91,860.51x = 126,757.71 × 51,578.67
  4. Step 4: Simplify right side
    91,860.51x = 6,537,994,094.05
  5. Step 5: Solve for x
    x = 6,537,994,094.05/91,860.51
  6. Step 6: Final answer
    x = 71,173.07

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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.