Home / 208,429.91-287,732.45-139,637.83

Finding the Fourth Proportional to 208,429.91, 287,732.45 and 139,637.83

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Solution

The fourth proportional to 208,429.91, 287,732.45 and 139,637.83 is: 192,766.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,429.91 : 287,732.45 = 139,637.83 : x
  2. Step 2: Convert to fraction form
    208,429.91/287,732.45 = 139,637.83/x
  3. Step 3: Cross multiply
    208,429.91x = 287,732.45 × 139,637.83
  4. Step 4: Simplify right side
    208,429.91x = 40,178,332,801.73
  5. Step 5: Solve for x
    x = 40,178,332,801.73/208,429.91
  6. Step 6: Final answer
    x = 192,766.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.