Home / 218,932.29-302,120.37-122,139

Finding the Fourth Proportional to 218,932.29, 302,120.37 and 122,139

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Solution

The fourth proportional to 218,932.29, 302,120.37 and 122,139 is: 168,548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,932.29 : 302,120.37 = 122,139 : x
  2. Step 2: Convert to fraction form
    218,932.29/302,120.37 = 122,139/x
  3. Step 3: Cross multiply
    218,932.29x = 302,120.37 × 122,139
  4. Step 4: Simplify right side
    218,932.29x = 36,900,679,871.43
  5. Step 5: Solve for x
    x = 36,900,679,871.43/218,932.29
  6. Step 6: Final answer
    x = 168,548.37

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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.