Home / 281,128.70-387,961.98-153,806.42

Finding the Fourth Proportional to 281,128.70, 387,961.98 and 153,806.42

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Solution

The fourth proportional to 281,128.70, 387,961.98 and 153,806.42 is: 212,255.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,128.70 : 387,961.98 = 153,806.42 : x
  2. Step 2: Convert to fraction form
    281,128.70/387,961.98 = 153,806.42/x
  3. Step 3: Cross multiply
    281,128.70x = 387,961.98 × 153,806.42
  4. Step 4: Simplify right side
    281,128.70x = 59,671,043,239.91
  5. Step 5: Solve for x
    x = 59,671,043,239.91/281,128.70
  6. Step 6: Final answer
    x = 212,255.25

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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.