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Finding the Fourth Proportional to 210,703.44, 290,768.72 and 115,209.12

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Solution

The fourth proportional to 210,703.44, 290,768.72 and 115,209.12 is: 158,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,703.44 : 290,768.72 = 115,209.12 : x
  2. Step 2: Convert to fraction form
    210,703.44/290,768.72 = 115,209.12/x
  3. Step 3: Cross multiply
    210,703.44x = 290,768.72 × 115,209.12
  4. Step 4: Simplify right side
    210,703.44x = 33,499,208,354.73
  5. Step 5: Solve for x
    x = 33,499,208,354.73/210,703.44
  6. Step 6: Final answer
    x = 158,987.48

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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.