Home / 218,865.12-302,015.72-123,395.28

Finding the Fourth Proportional to 218,865.12, 302,015.72 and 123,395.28

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Solution

The fourth proportional to 218,865.12, 302,015.72 and 123,395.28 is: 170,275.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,865.12 : 302,015.72 = 123,395.28 : x
  2. Step 2: Convert to fraction form
    218,865.12/302,015.72 = 123,395.28/x
  3. Step 3: Cross multiply
    218,865.12x = 302,015.72 × 123,395.28
  4. Step 4: Simplify right side
    218,865.12x = 37,267,314,333.80
  5. Step 5: Solve for x
    x = 37,267,314,333.80/218,865.12
  6. Step 6: Final answer
    x = 170,275.26

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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.