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Finding the Fourth Proportional to 79,580.34, 119,367.65 and 20,416.59

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Solution

The fourth proportional to 79,580.34, 119,367.65 and 20,416.59 is: 30,624.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,580.34 : 119,367.65 = 20,416.59 : x
  2. Step 2: Convert to fraction form
    79,580.34/119,367.65 = 20,416.59/x
  3. Step 3: Cross multiply
    79,580.34x = 119,367.65 × 20,416.59
  4. Step 4: Simplify right side
    79,580.34x = 2,437,080,420.35
  5. Step 5: Solve for x
    x = 2,437,080,420.35/79,580.34
  6. Step 6: Final answer
    x = 30,624.15

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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.