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Finding the Fourth Proportional to 218,975.40, 302,186.70 and 118,373.40

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Solution

The fourth proportional to 218,975.40, 302,186.70 and 118,373.40 is: 163,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,975.40 : 302,186.70 = 118,373.40 : x
  2. Step 2: Convert to fraction form
    218,975.40/302,186.70 = 118,373.40/x
  3. Step 3: Cross multiply
    218,975.40x = 302,186.70 × 118,373.40
  4. Step 4: Simplify right side
    218,975.40x = 35,770,867,113.78
  5. Step 5: Solve for x
    x = 35,770,867,113.78/218,975.40
  6. Step 6: Final answer
    x = 163,355.64

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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.