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Finding the Fourth Proportional to 262,927.30, 394,390.95 and 85,440.10

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Solution

The fourth proportional to 262,927.30, 394,390.95 and 85,440.10 is: 128,160.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,927.30 : 394,390.95 = 85,440.10 : x
  2. Step 2: Convert to fraction form
    262,927.30/394,390.95 = 85,440.10/x
  3. Step 3: Cross multiply
    262,927.30x = 394,390.95 × 85,440.10
  4. Step 4: Simplify right side
    262,927.30x = 33,696,802,207.10
  5. Step 5: Solve for x
    x = 33,696,802,207.10/262,927.30
  6. Step 6: Final answer
    x = 128,160.15

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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.