Home / 128,595.15-192,892.73-81,355.95

Finding the Fourth Proportional to 128,595.15, 192,892.73 and 81,355.95

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Solution

The fourth proportional to 128,595.15, 192,892.73 and 81,355.95 is: 122,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,595.15 : 192,892.73 = 81,355.95 : x
  2. Step 2: Convert to fraction form
    128,595.15/192,892.73 = 81,355.95/x
  3. Step 3: Cross multiply
    128,595.15x = 192,892.73 × 81,355.95
  4. Step 4: Simplify right side
    128,595.15x = 15,692,970,890.46
  5. Step 5: Solve for x
    x = 15,692,970,890.46/128,595.15
  6. Step 6: Final answer
    x = 122,033.93

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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.