Home / 103,821.60-155,404.35-81,514.20

Finding the Fourth Proportional to 103,821.60, 155,404.35 and 81,514.20

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Solution

The fourth proportional to 103,821.60, 155,404.35 and 81,514.20 is: 122,013.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,821.60 : 155,404.35 = 81,514.20 : x
  2. Step 2: Convert to fraction form
    103,821.60/155,404.35 = 81,514.20/x
  3. Step 3: Cross multiply
    103,821.60x = 155,404.35 × 81,514.20
  4. Step 4: Simplify right side
    103,821.60x = 12,667,661,266.77
  5. Step 5: Solve for x
    x = 12,667,661,266.77/103,821.60
  6. Step 6: Final answer
    x = 122,013.74

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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.