Home / 309,921.12-464,820.36-85,223.58

Finding the Fourth Proportional to 309,921.12, 464,820.36 and 85,223.58

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Solution

The fourth proportional to 309,921.12, 464,820.36 and 85,223.58 is: 127,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,921.12 : 464,820.36 = 85,223.58 : x
  2. Step 2: Convert to fraction form
    309,921.12/464,820.36 = 85,223.58/x
  3. Step 3: Cross multiply
    309,921.12x = 464,820.36 × 85,223.58
  4. Step 4: Simplify right side
    309,921.12x = 39,613,655,136.09
  5. Step 5: Solve for x
    x = 39,613,655,136.09/309,921.12
  6. Step 6: Final answer
    x = 127,818.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.