Home / 103,763.36-143,131.38-65,455.22

Finding the Fourth Proportional to 103,763.36, 143,131.38 and 65,455.22

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Solution

The fourth proportional to 103,763.36, 143,131.38 and 65,455.22 is: 90,289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,763.36 : 143,131.38 = 65,455.22 : x
  2. Step 2: Convert to fraction form
    103,763.36/143,131.38 = 65,455.22/x
  3. Step 3: Cross multiply
    103,763.36x = 143,131.38 × 65,455.22
  4. Step 4: Simplify right side
    103,763.36x = 9,368,695,966.80
  5. Step 5: Solve for x
    x = 9,368,695,966.80/103,763.36
  6. Step 6: Final answer
    x = 90,289.06

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1.5x scale

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.