Home / 149,721.72-206,607.12-81,725.16

Finding the Fourth Proportional to 149,721.72, 206,607.12 and 81,725.16

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Solution

The fourth proportional to 149,721.72, 206,607.12 and 81,725.16 is: 112,775.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,721.72 : 206,607.12 = 81,725.16 : x
  2. Step 2: Convert to fraction form
    149,721.72/206,607.12 = 81,725.16/x
  3. Step 3: Cross multiply
    149,721.72x = 206,607.12 × 81,725.16
  4. Step 4: Simplify right side
    149,721.72x = 16,884,999,939.14
  5. Step 5: Solve for x
    x = 16,884,999,939.14/149,721.72
  6. Step 6: Final answer
    x = 112,775.89

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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.