Home / 165,920.80-248,962.20-77,128.60

Finding the Fourth Proportional to 165,920.80, 248,962.20 and 77,128.60

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Solution

The fourth proportional to 165,920.80, 248,962.20 and 77,128.60 is: 115,730.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,920.80 : 248,962.20 = 77,128.60 : x
  2. Step 2: Convert to fraction form
    165,920.80/248,962.20 = 77,128.60/x
  3. Step 3: Cross multiply
    165,920.80x = 248,962.20 × 77,128.60
  4. Step 4: Simplify right side
    165,920.80x = 19,202,105,938.92
  5. Step 5: Solve for x
    x = 19,202,105,938.92/165,920.80
  6. Step 6: Final answer
    x = 115,730.55

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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.