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Finding the Fourth Proportional to 210,652.21, 316,058.12 and 126,471.16

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Solution

The fourth proportional to 210,652.21, 316,058.12 and 126,471.16 is: 189,754.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,652.21 : 316,058.12 = 126,471.16 : x
  2. Step 2: Convert to fraction form
    210,652.21/316,058.12 = 126,471.16/x
  3. Step 3: Cross multiply
    210,652.21x = 316,058.12 × 126,471.16
  4. Step 4: Simplify right side
    210,652.21x = 39,972,237,063.82
  5. Step 5: Solve for x
    x = 39,972,237,063.82/210,652.21
  6. Step 6: Final answer
    x = 189,754.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.