Home / 128,433.01-177,246.90-71,862.61

Finding the Fourth Proportional to 128,433.01, 177,246.90 and 71,862.61

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Solution

The fourth proportional to 128,433.01, 177,246.90 and 71,862.61 is: 99,175.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,433.01 : 177,246.90 = 71,862.61 : x
  2. Step 2: Convert to fraction form
    128,433.01/177,246.90 = 71,862.61/x
  3. Step 3: Cross multiply
    128,433.01x = 177,246.90 × 71,862.61
  4. Step 4: Simplify right side
    128,433.01x = 12,737,424,848.41
  5. Step 5: Solve for x
    x = 12,737,424,848.41/128,433.01
  6. Step 6: Final answer
    x = 99,175.63

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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.