Home / 123,448.12-170,199.30-100,763.80

Finding the Fourth Proportional to 123,448.12, 170,199.30 and 100,763.80

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Solution

The fourth proportional to 123,448.12, 170,199.30 and 100,763.80 is: 138,924.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,448.12 : 170,199.30 = 100,763.80 : x
  2. Step 2: Convert to fraction form
    123,448.12/170,199.30 = 100,763.80/x
  3. Step 3: Cross multiply
    123,448.12x = 170,199.30 × 100,763.80
  4. Step 4: Simplify right side
    123,448.12x = 17,149,928,225.34
  5. Step 5: Solve for x
    x = 17,149,928,225.34/123,448.12
  6. Step 6: Final answer
    x = 138,924.17

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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.