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Finding the Fourth Proportional to 210,965.35, 316,451.28 and 68,810.02

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Solution

The fourth proportional to 210,965.35, 316,451.28 and 68,810.02 is: 103,216.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,965.35 : 316,451.28 = 68,810.02 : x
  2. Step 2: Convert to fraction form
    210,965.35/316,451.28 = 68,810.02/x
  3. Step 3: Cross multiply
    210,965.35x = 316,451.28 × 68,810.02
  4. Step 4: Simplify right side
    210,965.35x = 21,775,018,905.83
  5. Step 5: Solve for x
    x = 21,775,018,905.83/210,965.35
  6. Step 6: Final answer
    x = 103,216.09

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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.