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Finding the Fourth Proportional to 91,259.86, 136,911.78 and 28,930.36

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Solution

The fourth proportional to 91,259.86, 136,911.78 and 28,930.36 is: 43,402.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,259.86 : 136,911.78 = 28,930.36 : x
  2. Step 2: Convert to fraction form
    91,259.86/136,911.78 = 28,930.36/x
  3. Step 3: Cross multiply
    91,259.86x = 136,911.78 × 28,930.36
  4. Step 4: Simplify right side
    91,259.86x = 3,960,907,083.64
  5. Step 5: Solve for x
    x = 3,960,907,083.64/91,259.86
  6. Step 6: Final answer
    x = 43,402.51

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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.