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Finding the Fourth Proportional to 424,043.46, 636,159.06 and 139,722.57

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Solution

The fourth proportional to 424,043.46, 636,159.06 and 139,722.57 is: 209,614.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,043.46 : 636,159.06 = 139,722.57 : x
  2. Step 2: Convert to fraction form
    424,043.46/636,159.06 = 139,722.57/x
  3. Step 3: Cross multiply
    424,043.46x = 636,159.06 × 139,722.57
  4. Step 4: Simplify right side
    424,043.46x = 88,885,778,791.98
  5. Step 5: Solve for x
    x = 88,885,778,791.98/424,043.46
  6. Step 6: Final answer
    x = 209,614.79

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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.