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Finding the Fourth Proportional to 60,978.83, 91,495.40 and 38,786.45

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Solution

The fourth proportional to 60,978.83, 91,495.40 and 38,786.45 is: 58,196.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.83 : 91,495.40 = 38,786.45 : x
  2. Step 2: Convert to fraction form
    60,978.83/91,495.40 = 38,786.45/x
  3. Step 3: Cross multiply
    60,978.83x = 91,495.40 × 38,786.45
  4. Step 4: Simplify right side
    60,978.83x = 3,548,781,105.92
  5. Step 5: Solve for x
    x = 3,548,781,105.92/60,978.83
  6. Step 6: Final answer
    x = 58,196.94

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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.