Home / 141,814.20-212,721.30-78,828.60

Finding the Fourth Proportional to 141,814.20, 212,721.30 and 78,828.60

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Solution

The fourth proportional to 141,814.20, 212,721.30 and 78,828.60 is: 118,242.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,814.20 : 212,721.30 = 78,828.60 : x
  2. Step 2: Convert to fraction form
    141,814.20/212,721.30 = 78,828.60/x
  3. Step 3: Cross multiply
    141,814.20x = 212,721.30 × 78,828.60
  4. Step 4: Simplify right side
    141,814.20x = 16,768,522,269.18
  5. Step 5: Solve for x
    x = 16,768,522,269.18/141,814.20
  6. Step 6: Final answer
    x = 118,242.90

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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.