Home / 208,429.90-287,732.45-139,637.82

Finding the Fourth Proportional to 208,429.90, 287,732.45 and 139,637.82

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Solution

The fourth proportional to 208,429.90, 287,732.45 and 139,637.82 is: 192,766.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,429.90 : 287,732.45 = 139,637.82 : x
  2. Step 2: Convert to fraction form
    208,429.90/287,732.45 = 139,637.82/x
  3. Step 3: Cross multiply
    208,429.90x = 287,732.45 × 139,637.82
  4. Step 4: Simplify right side
    208,429.90x = 40,178,332,061.26
  5. Step 5: Solve for x
    x = 40,178,332,061.26/208,429.90
  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.