Home / 154,090.49-212,640.78-86,108.02

Finding the Fourth Proportional to 154,090.49, 212,640.78 and 86,108.02

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Solution

The fourth proportional to 154,090.49, 212,640.78 and 86,108.02 is: 118,826.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,090.49 : 212,640.78 = 86,108.02 : x
  2. Step 2: Convert to fraction form
    154,090.49/212,640.78 = 86,108.02/x
  3. Step 3: Cross multiply
    154,090.49x = 212,640.78 × 86,108.02
  4. Step 4: Simplify right side
    154,090.49x = 18,310,076,537.06
  5. Step 5: Solve for x
    x = 18,310,076,537.06/154,090.49
  6. Step 6: Final answer
    x = 118,826.78

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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.