Home / 103,919.83-143,371.69-85,136.47

Finding the Fourth Proportional to 103,919.83, 143,371.69 and 85,136.47

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Solution

The fourth proportional to 103,919.83, 143,371.69 and 85,136.47 is: 117,457.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,919.83 : 143,371.69 = 85,136.47 : x
  2. Step 2: Convert to fraction form
    103,919.83/143,371.69 = 85,136.47/x
  3. Step 3: Cross multiply
    103,919.83x = 143,371.69 × 85,136.47
  4. Step 4: Simplify right side
    103,919.83x = 12,206,159,584.53
  5. Step 5: Solve for x
    x = 12,206,159,584.53/103,919.83
  6. Step 6: Final answer
    x = 117,457.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.