Home / 219,363.73-302,723.94-128,721.20

Finding the Fourth Proportional to 219,363.73, 302,723.94 and 128,721.20

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Solution

The fourth proportional to 219,363.73, 302,723.94 and 128,721.20 is: 177,636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,363.73 : 302,723.94 = 128,721.20 : x
  2. Step 2: Convert to fraction form
    219,363.73/302,723.94 = 128,721.20/x
  3. Step 3: Cross multiply
    219,363.73x = 302,723.94 × 128,721.20
  4. Step 4: Simplify right side
    219,363.73x = 38,966,989,497.44
  5. Step 5: Solve for x
    x = 38,966,989,497.44/219,363.73
  6. Step 6: Final answer
    x = 177,636.43

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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.