Home / 143,145.72-197,547.12-79,489.44

Finding the Fourth Proportional to 143,145.72, 197,547.12 and 79,489.44

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Solution

The fourth proportional to 143,145.72, 197,547.12 and 79,489.44 is: 109,698.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,145.72 : 197,547.12 = 79,489.44 : x
  2. Step 2: Convert to fraction form
    143,145.72/197,547.12 = 79,489.44/x
  3. Step 3: Cross multiply
    143,145.72x = 197,547.12 × 79,489.44
  4. Step 4: Simplify right side
    143,145.72x = 15,702,909,942.41
  5. Step 5: Solve for x
    x = 15,702,909,942.41/143,145.72
  6. Step 6: Final answer
    x = 109,698.77

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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.