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Finding the Fourth Proportional to 272,252.90, 408,051.30 and 139,064.60

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Solution

The fourth proportional to 272,252.90, 408,051.30 and 139,064.60 is: 208,429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,252.90 : 408,051.30 = 139,064.60 : x
  2. Step 2: Convert to fraction form
    272,252.90/408,051.30 = 139,064.60/x
  3. Step 3: Cross multiply
    272,252.90x = 408,051.30 × 139,064.60
  4. Step 4: Simplify right side
    272,252.90x = 56,745,490,813.98
  5. Step 5: Solve for x
    x = 56,745,490,813.98/272,252.90
  6. Step 6: Final answer
    x = 208,429.33

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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.