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Finding the Fourth Proportional to 218,967.93, 302,175.96 and 128,305.83

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Solution

The fourth proportional to 218,967.93, 302,175.96 and 128,305.83 is: 177,062.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,967.93 : 302,175.96 = 128,305.83 : x
  2. Step 2: Convert to fraction form
    218,967.93/302,175.96 = 128,305.83/x
  3. Step 3: Cross multiply
    218,967.93x = 302,175.96 × 128,305.83
  4. Step 4: Simplify right side
    218,967.93x = 38,770,937,353.85
  5. Step 5: Solve for x
    x = 38,770,937,353.85/218,967.93
  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.