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Finding the Fourth Proportional to 210,900.86, 316,342.04 and 61,137.88

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Solution

The fourth proportional to 210,900.86, 316,342.04 and 61,137.88 is: 91,704.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,900.86 : 316,342.04 = 61,137.88 : x
  2. Step 2: Convert to fraction form
    210,900.86/316,342.04 = 61,137.88/x
  3. Step 3: Cross multiply
    210,900.86x = 316,342.04 × 61,137.88
  4. Step 4: Simplify right side
    210,900.86x = 19,340,481,680.48
  5. Step 5: Solve for x
    x = 19,340,481,680.48/210,900.86
  6. Step 6: Final answer
    x = 91,704.14

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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.