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Finding the Fourth Proportional to 84,165.83, 126,239.41 and 30,128.37

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Solution

The fourth proportional to 84,165.83, 126,239.41 and 30,128.37 is: 45,189.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,165.83 : 126,239.41 = 30,128.37 : x
  2. Step 2: Convert to fraction form
    84,165.83/126,239.41 = 30,128.37/x
  3. Step 3: Cross multiply
    84,165.83x = 126,239.41 × 30,128.37
  4. Step 4: Simplify right side
    84,165.83x = 3,803,387,653.06
  5. Step 5: Solve for x
    x = 3,803,387,653.06/84,165.83
  6. Step 6: Final answer
    x = 45,189.21

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1.5x scale

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.