Home / 218,985.21-302,274.83-128,370.33

Finding the Fourth Proportional to 218,985.21, 302,274.83 and 128,370.33

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Solution

The fourth proportional to 218,985.21, 302,274.83 and 128,370.33 is: 177,195.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,985.21 : 302,274.83 = 128,370.33 : x
  2. Step 2: Convert to fraction form
    218,985.21/302,274.83 = 128,370.33/x
  3. Step 3: Cross multiply
    218,985.21x = 302,274.83 × 128,370.33
  4. Step 4: Simplify right side
    218,985.21x = 38,803,119,035.94
  5. Step 5: Solve for x
    x = 38,803,119,035.94/218,985.21
  6. Step 6: Final answer
    x = 177,195.16

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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.