Home / 154,072.12-212,629.44-90,386.68

Finding the Fourth Proportional to 154,072.12, 212,629.44 and 90,386.68

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Solution

The fourth proportional to 154,072.12, 212,629.44 and 90,386.68 is: 124,739.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,072.12 : 212,629.44 = 90,386.68 : x
  2. Step 2: Convert to fraction form
    154,072.12/212,629.44 = 90,386.68/x
  3. Step 3: Cross multiply
    154,072.12x = 212,629.44 × 90,386.68
  4. Step 4: Simplify right side
    154,072.12x = 19,218,869,151.86
  5. Step 5: Solve for x
    x = 19,218,869,151.86/154,072.12
  6. Step 6: Final answer
    x = 124,739.43

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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.