Home / 210,509.08-290,506.72-115,021.68

Finding the Fourth Proportional to 210,509.08, 290,506.72 and 115,021.68

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Solution

The fourth proportional to 210,509.08, 290,506.72 and 115,021.68 is: 158,732.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,509.08 : 290,506.72 = 115,021.68 : x
  2. Step 2: Convert to fraction form
    210,509.08/290,506.72 = 115,021.68/x
  3. Step 3: Cross multiply
    210,509.08x = 290,506.72 × 115,021.68
  4. Step 4: Simplify right side
    210,509.08x = 33,414,570,985.69
  5. Step 5: Solve for x
    x = 33,414,570,985.69/210,509.08
  6. Step 6: Final answer
    x = 158,732.21

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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.