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Finding the Fourth Proportional to 210,616.96, 290,650.72 and 115,123.68

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Solution

The fourth proportional to 210,616.96, 290,650.72 and 115,123.68 is: 158,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,616.96 : 290,650.72 = 115,123.68 : x
  2. Step 2: Convert to fraction form
    210,616.96/290,650.72 = 115,123.68/x
  3. Step 3: Cross multiply
    210,616.96x = 290,650.72 × 115,123.68
  4. Step 4: Simplify right side
    210,616.96x = 33,460,780,481.05
  5. Step 5: Solve for x
    x = 33,460,780,481.05/210,616.96
  6. Step 6: Final answer
    x = 158,870.30

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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.