Home / 210,830.18-290,947.75-115,340.90

Finding the Fourth Proportional to 210,830.18, 290,947.75 and 115,340.90

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Solution

The fourth proportional to 210,830.18, 290,947.75 and 115,340.90 is: 159,171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,830.18 : 290,947.75 = 115,340.90 : x
  2. Step 2: Convert to fraction form
    210,830.18/290,947.75 = 115,340.90/x
  3. Step 3: Cross multiply
    210,830.18x = 290,947.75 × 115,340.90
  4. Step 4: Simplify right side
    210,830.18x = 33,558,173,594.88
  5. Step 5: Solve for x
    x = 33,558,173,594.88/210,830.18
  6. Step 6: Final answer
    x = 159,171.59

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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.