Home / 427,077.12-640,615.80-111,531.30

Finding the Fourth Proportional to 427,077.12, 640,615.80 and 111,531.30

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Solution

The fourth proportional to 427,077.12, 640,615.80 and 111,531.30 is: 167,296.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,077.12 : 640,615.80 = 111,531.30 : x
  2. Step 2: Convert to fraction form
    427,077.12/640,615.80 = 111,531.30/x
  3. Step 3: Cross multiply
    427,077.12x = 640,615.80 × 111,531.30
  4. Step 4: Simplify right side
    427,077.12x = 71,448,712,974.54
  5. Step 5: Solve for x
    x = 71,448,712,974.54/427,077.12
  6. Step 6: Final answer
    x = 167,296.98

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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.