Home / 158,021.12-218,067.64-86,400.38

Finding the Fourth Proportional to 158,021.12, 218,067.64 and 86,400.38

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Solution

The fourth proportional to 158,021.12, 218,067.64 and 86,400.38 is: 119,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,021.12 : 218,067.64 = 86,400.38 : x
  2. Step 2: Convert to fraction form
    158,021.12/218,067.64 = 86,400.38/x
  3. Step 3: Cross multiply
    158,021.12x = 218,067.64 × 86,400.38
  4. Step 4: Simplify right side
    158,021.12x = 18,841,127,290.87
  5. Step 5: Solve for x
    x = 18,841,127,290.87/158,021.12
  6. Step 6: Final answer
    x = 119,231.70

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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.