Home / 210,515.81-290,508.39-115,020.45

Finding the Fourth Proportional to 210,515.81, 290,508.39 and 115,020.45

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Solution

The fourth proportional to 210,515.81, 290,508.39 and 115,020.45 is: 158,726.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,515.81 : 290,508.39 = 115,020.45 : x
  2. Step 2: Convert to fraction form
    210,515.81/290,508.39 = 115,020.45/x
  3. Step 3: Cross multiply
    210,515.81x = 290,508.39 × 115,020.45
  4. Step 4: Simplify right side
    210,515.81x = 33,414,405,746.58
  5. Step 5: Solve for x
    x = 33,414,405,746.58/210,515.81
  6. Step 6: Final answer
    x = 158,726.35

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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.