Home / 128,619.04-177,489.28-72,027.52

Finding the Fourth Proportional to 128,619.04, 177,489.28 and 72,027.52

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Solution

The fourth proportional to 128,619.04, 177,489.28 and 72,027.52 is: 99,395.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,619.04 : 177,489.28 = 72,027.52 : x
  2. Step 2: Convert to fraction form
    128,619.04/177,489.28 = 72,027.52/x
  3. Step 3: Cross multiply
    128,619.04x = 177,489.28 × 72,027.52
  4. Step 4: Simplify right side
    128,619.04x = 12,784,112,664.99
  5. Step 5: Solve for x
    x = 12,784,112,664.99/128,619.04
  6. Step 6: Final answer
    x = 99,395.18

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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.