Home / 149,128.96-205,806.48-85,477.36

Finding the Fourth Proportional to 149,128.96, 205,806.48 and 85,477.36

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Solution

The fourth proportional to 149,128.96, 205,806.48 and 85,477.36 is: 117,963.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,128.96 : 205,806.48 = 85,477.36 : x
  2. Step 2: Convert to fraction form
    149,128.96/205,806.48 = 85,477.36/x
  3. Step 3: Cross multiply
    149,128.96x = 205,806.48 × 85,477.36
  4. Step 4: Simplify right side
    149,128.96x = 17,591,794,581.29
  5. Step 5: Solve for x
    x = 17,591,794,581.29/149,128.96
  6. Step 6: Final answer
    x = 117,963.64

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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.