Home / 100,021.80-138,043.14-57,582.12

Finding the Fourth Proportional to 100,021.80, 138,043.14 and 57,582.12

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Solution

The fourth proportional to 100,021.80, 138,043.14 and 57,582.12 is: 79,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,021.80 : 138,043.14 = 57,582.12 : x
  2. Step 2: Convert to fraction form
    100,021.80/138,043.14 = 57,582.12/x
  3. Step 3: Cross multiply
    100,021.80x = 138,043.14 × 57,582.12
  4. Step 4: Simplify right side
    100,021.80x = 7,948,816,652.66
  5. Step 5: Solve for x
    x = 7,948,816,652.66/100,021.80
  6. Step 6: Final answer
    x = 79,470.84

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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.