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Finding the Fourth Proportional to 218,920.60, 302,109.78 and 118,318.60

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Solution

The fourth proportional to 218,920.60, 302,109.78 and 118,318.60 is: 163,279.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,920.60 : 302,109.78 = 118,318.60 : x
  2. Step 2: Convert to fraction form
    218,920.60/302,109.78 = 118,318.60/x
  3. Step 3: Cross multiply
    218,920.60x = 302,109.78 × 118,318.60
  4. Step 4: Simplify right side
    218,920.60x = 35,745,206,215.91
  5. Step 5: Solve for x
    x = 35,745,206,215.91/218,920.60
  6. Step 6: Final answer
    x = 163,279.32

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1.5x scale

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.