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Finding the Fourth Proportional to 218,966.29, 302,175.66 and 128,375.89

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Solution

The fourth proportional to 218,966.29, 302,175.66 and 128,375.89 is: 177,160.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,966.29 : 302,175.66 = 128,375.89 : x
  2. Step 2: Convert to fraction form
    218,966.29/302,175.66 = 128,375.89/x
  3. Step 3: Cross multiply
    218,966.29x = 302,175.66 × 128,375.89
  4. Step 4: Simplify right side
    218,966.29x = 38,792,069,014.81
  5. Step 5: Solve for x
    x = 38,792,069,014.81/218,966.29
  6. Step 6: Final answer
    x = 177,160.01

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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.