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Finding the Fourth Proportional to 210,687.48, 290,748.69 and 115,194.15

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Solution

The fourth proportional to 210,687.48, 290,748.69 and 115,194.15 is: 158,967.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,687.48 : 290,748.69 = 115,194.15 : x
  2. Step 2: Convert to fraction form
    210,687.48/290,748.69 = 115,194.15/x
  3. Step 3: Cross multiply
    210,687.48x = 290,748.69 × 115,194.15
  4. Step 4: Simplify right side
    210,687.48x = 33,492,548,208.16
  5. Step 5: Solve for x
    x = 33,492,548,208.16/210,687.48
  6. Step 6: Final answer
    x = 158,967.91

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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.