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Finding the Fourth Proportional to 272,221.76, 408,415.71 and 139,195.46

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Solution

The fourth proportional to 272,221.76, 408,415.71 and 139,195.46 is: 208,835.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,221.76 : 408,415.71 = 139,195.46 : x
  2. Step 2: Convert to fraction form
    272,221.76/408,415.71 = 139,195.46/x
  3. Step 3: Cross multiply
    272,221.76x = 408,415.71 × 139,195.46
  4. Step 4: Simplify right side
    272,221.76x = 56,849,610,582.60
  5. Step 5: Solve for x
    x = 56,849,610,582.60/272,221.76
  6. Step 6: Final answer
    x = 208,835.66

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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.