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Finding the Fourth Proportional to 210,872.70, 290,999.79 and 115,379.10

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Solution

The fourth proportional to 210,872.70, 290,999.79 and 115,379.10 is: 159,220.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,872.70 : 290,999.79 = 115,379.10 : x
  2. Step 2: Convert to fraction form
    210,872.70/290,999.79 = 115,379.10/x
  3. Step 3: Cross multiply
    210,872.70x = 290,999.79 × 115,379.10
  4. Step 4: Simplify right side
    210,872.70x = 33,575,293,870.39
  5. Step 5: Solve for x
    x = 33,575,293,870.39/210,872.70
  6. Step 6: Final answer
    x = 159,220.68

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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.