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Finding the Fourth Proportional to 79,486.92, 118,970.78 and 58,421.39

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Solution

The fourth proportional to 79,486.92, 118,970.78 and 58,421.39 is: 87,441.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,486.92 : 118,970.78 = 58,421.39 : x
  2. Step 2: Convert to fraction form
    79,486.92/118,970.78 = 58,421.39/x
  3. Step 3: Cross multiply
    79,486.92x = 118,970.78 × 58,421.39
  4. Step 4: Simplify right side
    79,486.92x = 6,950,437,450.02
  5. Step 5: Solve for x
    x = 6,950,437,450.02/79,486.92
  6. Step 6: Final answer
    x = 87,441.27

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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.