Home / 128,627.28-177,491.52-72,037.44

Finding the Fourth Proportional to 128,627.28, 177,491.52 and 72,037.44

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Solution

The fourth proportional to 128,627.28, 177,491.52 and 72,037.44 is: 99,403.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,627.28 : 177,491.52 = 72,037.44 : x
  2. Step 2: Convert to fraction form
    128,627.28/177,491.52 = 72,037.44/x
  3. Step 3: Cross multiply
    128,627.28x = 177,491.52 × 72,037.44
  4. Step 4: Simplify right side
    128,627.28x = 12,786,034,722.51
  5. Step 5: Solve for x
    x = 12,786,034,722.51/128,627.28
  6. Step 6: Final answer
    x = 99,403.76

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1.5x scale

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.