Home / 218,972.43-302,182.17-128,310.36

Finding the Fourth Proportional to 218,972.43, 302,182.17 and 128,310.36

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Solution

The fourth proportional to 218,972.43, 302,182.17 and 128,310.36 is: 177,068.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,972.43 : 302,182.17 = 128,310.36 : x
  2. Step 2: Convert to fraction form
    218,972.43/302,182.17 = 128,310.36/x
  3. Step 3: Cross multiply
    218,972.43x = 302,182.17 × 128,310.36
  4. Step 4: Simplify right side
    218,972.43x = 38,773,103,018.28
  5. Step 5: Solve for x
    x = 38,773,103,018.28/218,972.43
  6. Step 6: Final answer
    x = 177,068.42

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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.