Home / 218,921.90-302,112.59-123,428.34

Finding the Fourth Proportional to 218,921.90, 302,112.59 and 123,428.34

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Solution

The fourth proportional to 218,921.90, 302,112.59 and 123,428.34 is: 170,331.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,921.90 : 302,112.59 = 123,428.34 : x
  2. Step 2: Convert to fraction form
    218,921.90/302,112.59 = 123,428.34/x
  3. Step 3: Cross multiply
    218,921.90x = 302,112.59 × 123,428.34
  4. Step 4: Simplify right side
    218,921.90x = 37,289,254,859.66
  5. Step 5: Solve for x
    x = 37,289,254,859.66/218,921.90
  6. Step 6: Final answer
    x = 170,331.32

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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.