Home / 103,851.10-155,448.60-81,543.70

Finding the Fourth Proportional to 103,851.10, 155,448.60 and 81,543.70

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Solution

The fourth proportional to 103,851.10, 155,448.60 and 81,543.70 is: 122,057.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,851.10 : 155,448.60 = 81,543.70 : x
  2. Step 2: Convert to fraction form
    103,851.10/155,448.60 = 81,543.70/x
  3. Step 3: Cross multiply
    103,851.10x = 155,448.60 × 81,543.70
  4. Step 4: Simplify right side
    103,851.10x = 12,675,854,003.82
  5. Step 5: Solve for x
    x = 12,675,854,003.82/103,851.10
  6. Step 6: Final answer
    x = 122,057.97

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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.