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Finding the Fourth Proportional to 210,993.36, 291,169.80 and 115,498.32

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Solution

The fourth proportional to 210,993.36, 291,169.80 and 115,498.32 is: 159,387.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,993.36 : 291,169.80 = 115,498.32 : x
  2. Step 2: Convert to fraction form
    210,993.36/291,169.80 = 115,498.32/x
  3. Step 3: Cross multiply
    210,993.36x = 291,169.80 × 115,498.32
  4. Step 4: Simplify right side
    210,993.36x = 33,629,622,734.74
  5. Step 5: Solve for x
    x = 33,629,622,734.74/210,993.36
  6. Step 6: Final answer
    x = 159,387.11

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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.