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Finding the Fourth Proportional to 210,937.20, 316,405.80 and 63,193.20

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Solution

The fourth proportional to 210,937.20, 316,405.80 and 63,193.20 is: 94,789.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,937.20 : 316,405.80 = 63,193.20 : x
  2. Step 2: Convert to fraction form
    210,937.20/316,405.80 = 63,193.20/x
  3. Step 3: Cross multiply
    210,937.20x = 316,405.80 × 63,193.20
  4. Step 4: Simplify right side
    210,937.20x = 19,994,695,000.56
  5. Step 5: Solve for x
    x = 19,994,695,000.56/210,937.20
  6. Step 6: Final answer
    x = 94,789.80

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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.