Home / 103,964.89-143,493.79-65,700.09

Finding the Fourth Proportional to 103,964.89, 143,493.79 and 65,700.09

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Solution

The fourth proportional to 103,964.89, 143,493.79 and 65,700.09 is: 90,680.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,964.89 : 143,493.79 = 65,700.09 : x
  2. Step 2: Convert to fraction form
    103,964.89/143,493.79 = 65,700.09/x
  3. Step 3: Cross multiply
    103,964.89x = 143,493.79 × 65,700.09
  4. Step 4: Simplify right side
    103,964.89x = 9,427,554,917.44
  5. Step 5: Solve for x
    x = 9,427,554,917.44/103,964.89
  6. Step 6: Final answer
    x = 90,680.18

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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.