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Finding the Fourth Proportional to 210,965.31, 316,152.72 and 122,194.98

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Solution

The fourth proportional to 210,965.31, 316,152.72 and 122,194.98 is: 183,121.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,965.31 : 316,152.72 = 122,194.98 : x
  2. Step 2: Convert to fraction form
    210,965.31/316,152.72 = 122,194.98/x
  3. Step 3: Cross multiply
    210,965.31x = 316,152.72 × 122,194.98
  4. Step 4: Simplify right side
    210,965.31x = 38,632,275,297.35
  5. Step 5: Solve for x
    x = 38,632,275,297.35/210,965.31
  6. Step 6: Final answer
    x = 183,121.46

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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.