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Finding the Fourth Proportional to 420,577.56, 630,866.34 and 125,089.56

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Solution

The fourth proportional to 420,577.56, 630,866.34 and 125,089.56 is: 187,634.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,577.56 : 630,866.34 = 125,089.56 : x
  2. Step 2: Convert to fraction form
    420,577.56/630,866.34 = 125,089.56/x
  3. Step 3: Cross multiply
    420,577.56x = 630,866.34 × 125,089.56
  4. Step 4: Simplify right side
    420,577.56x = 78,914,792,889.41
  5. Step 5: Solve for x
    x = 78,914,792,889.41/420,577.56
  6. Step 6: Final answer
    x = 187,634.34

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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.