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Finding the Fourth Proportional to 218,991.94, 302,209.18 and 118,389.94

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Solution

The fourth proportional to 218,991.94, 302,209.18 and 118,389.94 is: 163,378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,991.94 : 302,209.18 = 118,389.94 : x
  2. Step 2: Convert to fraction form
    218,991.94/302,209.18 = 118,389.94/x
  3. Step 3: Cross multiply
    218,991.94x = 302,209.18 × 118,389.94
  4. Step 4: Simplify right side
    218,991.94x = 35,778,525,636.15
  5. Step 5: Solve for x
    x = 35,778,525,636.15/218,991.94
  6. Step 6: Final answer
    x = 163,378.28

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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.