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Finding the Fourth Proportional to 218,967.91, 302,175.95 and 128,305.82

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Solution

The fourth proportional to 218,967.91, 302,175.95 and 128,305.82 is: 177,062.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,967.91 : 302,175.95 = 128,305.82 : x
  2. Step 2: Convert to fraction form
    218,967.91/302,175.95 = 128,305.82/x
  3. Step 3: Cross multiply
    218,967.91x = 302,175.95 × 128,305.82
  4. Step 4: Simplify right side
    218,967.91x = 38,770,933,162.94
  5. Step 5: Solve for x
    x = 38,770,933,162.94/218,967.91
  6. Step 6: Final answer
    x = 177,062.17

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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.