Home / 426,936.12-640,403.49-111,393.02

Finding the Fourth Proportional to 426,936.12, 640,403.49 and 111,393.02

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Solution

The fourth proportional to 426,936.12, 640,403.49 and 111,393.02 is: 167,089.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,936.12 : 640,403.49 = 111,393.02 : x
  2. Step 2: Convert to fraction form
    426,936.12/640,403.49 = 111,393.02/x
  3. Step 3: Cross multiply
    426,936.12x = 640,403.49 × 111,393.02
  4. Step 4: Simplify right side
    426,936.12x = 71,336,475,567.62
  5. Step 5: Solve for x
    x = 71,336,475,567.62/426,936.12
  6. Step 6: Final answer
    x = 167,089.34

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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.