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Finding the Fourth Proportional to 218,948.65, 302,149.57 and 118,346.65

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Solution

The fourth proportional to 218,948.65, 302,149.57 and 118,346.65 is: 163,318.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,948.65 : 302,149.57 = 118,346.65 : x
  2. Step 2: Convert to fraction form
    218,948.65/302,149.57 = 118,346.65/x
  3. Step 3: Cross multiply
    218,948.65x = 302,149.57 × 118,346.65
  4. Step 4: Simplify right side
    218,948.65x = 35,758,389,408.44
  5. Step 5: Solve for x
    x = 35,758,389,408.44/218,948.65
  6. Step 6: Final answer
    x = 163,318.61

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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.