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Finding the Fourth Proportional to 218,958.79, 302,163 and 118,356.79

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Solution

The fourth proportional to 218,958.79, 302,163 and 118,356.79 is: 163,332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,958.79 : 302,163 = 118,356.79 : x
  2. Step 2: Convert to fraction form
    218,958.79/302,163 = 118,356.79/x
  3. Step 3: Cross multiply
    218,958.79x = 302,163 × 118,356.79
  4. Step 4: Simplify right side
    218,958.79x = 35,763,042,736.77
  5. Step 5: Solve for x
    x = 35,763,042,736.77/218,958.79
  6. Step 6: Final answer
    x = 163,332.30

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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.