Home / 80,780.36-111,513.31-57,828.20

Finding the Fourth Proportional to 80,780.36, 111,513.31 and 57,828.20

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Solution

The fourth proportional to 80,780.36, 111,513.31 and 57,828.20 is: 79,828.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,780.36 : 111,513.31 = 57,828.20 : x
  2. Step 2: Convert to fraction form
    80,780.36/111,513.31 = 57,828.20/x
  3. Step 3: Cross multiply
    80,780.36x = 111,513.31 × 57,828.20
  4. Step 4: Simplify right side
    80,780.36x = 6,448,613,291.20
  5. Step 5: Solve for x
    x = 6,448,613,291.20/80,780.36
  6. Step 6: Final answer
    x = 79,828.98

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1.5x scale

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.