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Finding the Fourth Proportional to 210,663.90, 290,714.22 and 115,170.30

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Solution

The fourth proportional to 210,663.90, 290,714.22 and 115,170.30 is: 158,933.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,663.90 : 290,714.22 = 115,170.30 : x
  2. Step 2: Convert to fraction form
    210,663.90/290,714.22 = 115,170.30/x
  3. Step 3: Cross multiply
    210,663.90x = 290,714.22 × 115,170.30
  4. Step 4: Simplify right side
    210,663.90x = 33,481,643,931.67
  5. Step 5: Solve for x
    x = 33,481,643,931.67/210,663.90
  6. Step 6: Final answer
    x = 158,933.94

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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.