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Finding the Fourth Proportional to 424,420.76, 636,709.71 and 140,131.11

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Solution

The fourth proportional to 424,420.76, 636,709.71 and 140,131.11 is: 210,222.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,420.76 : 636,709.71 = 140,131.11 : x
  2. Step 2: Convert to fraction form
    424,420.76/636,709.71 = 140,131.11/x
  3. Step 3: Cross multiply
    424,420.76x = 636,709.71 × 140,131.11
  4. Step 4: Simplify right side
    424,420.76x = 89,222,841,323.23
  5. Step 5: Solve for x
    x = 89,222,841,323.23/424,420.76
  6. Step 6: Final answer
    x = 210,222.61

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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.