Home / 218,973.12-302,159.36-128,311.04

Finding the Fourth Proportional to 218,973.12, 302,159.36 and 128,311.04

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Solution

The fourth proportional to 218,973.12, 302,159.36 and 128,311.04 is: 177,055.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,973.12 : 302,159.36 = 128,311.04 : x
  2. Step 2: Convert to fraction form
    218,973.12/302,159.36 = 128,311.04/x
  3. Step 3: Cross multiply
    218,973.12x = 302,159.36 × 128,311.04
  4. Step 4: Simplify right side
    218,973.12x = 38,770,381,727.33
  5. Step 5: Solve for x
    x = 38,770,381,727.33/218,973.12
  6. Step 6: Final answer
    x = 177,055.44

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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.