Home / 210,507.78-290,497.35-115,012.43

Finding the Fourth Proportional to 210,507.78, 290,497.35 and 115,012.43

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Solution

The fourth proportional to 210,507.78, 290,497.35 and 115,012.43 is: 158,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,507.78 : 290,497.35 = 115,012.43 : x
  2. Step 2: Convert to fraction form
    210,507.78/290,497.35 = 115,012.43/x
  3. Step 3: Cross multiply
    210,507.78x = 290,497.35 × 115,012.43
  4. Step 4: Simplify right side
    210,507.78x = 33,410,806,132.06
  5. Step 5: Solve for x
    x = 33,410,806,132.06/210,507.78
  6. Step 6: Final answer
    x = 158,715.30

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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.