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Finding the Fourth Proportional to 642,138.66, 963,131.31 and 168,860.88

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Solution

The fourth proportional to 642,138.66, 963,131.31 and 168,860.88 is: 253,271.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,138.66 : 963,131.31 = 168,860.88 : x
  2. Step 2: Convert to fraction form
    642,138.66/963,131.31 = 168,860.88/x
  3. Step 3: Cross multiply
    642,138.66x = 963,131.31 × 168,860.88
  4. Step 4: Simplify right side
    642,138.66x = 162,635,200,562.15
  5. Step 5: Solve for x
    x = 162,635,200,562.15/642,138.66
  6. Step 6: Final answer
    x = 253,271.16

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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.