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Finding the Fourth Proportional to 218,978.20, 302,189.79 and 118,376.20

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Solution

The fourth proportional to 218,978.20, 302,189.79 and 118,376.20 is: 163,359.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,978.20 : 302,189.79 = 118,376.20 : x
  2. Step 2: Convert to fraction form
    218,978.20/302,189.79 = 118,376.20/x
  3. Step 3: Cross multiply
    218,978.20x = 302,189.79 × 118,376.20
  4. Step 4: Simplify right side
    218,978.20x = 35,772,079,019.00
  5. Step 5: Solve for x
    x = 35,772,079,019.00/218,978.20
  6. Step 6: Final answer
    x = 163,359.09

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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.