Home / 281,128.20-387,959.78-153,801

Finding the Fourth Proportional to 281,128.20, 387,959.78 and 153,801

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Solution

The fourth proportional to 281,128.20, 387,959.78 and 153,801 is: 212,246.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,128.20 : 387,959.78 = 153,801 : x
  2. Step 2: Convert to fraction form
    281,128.20/387,959.78 = 153,801/x
  3. Step 3: Cross multiply
    281,128.20x = 387,959.78 × 153,801
  4. Step 4: Simplify right side
    281,128.20x = 59,668,602,123.78
  5. Step 5: Solve for x
    x = 59,668,602,123.78/281,128.20
  6. Step 6: Final answer
    x = 212,246.95

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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.