Home / 128,931.58-177,922.92-71,567.56

Finding the Fourth Proportional to 128,931.58, 177,922.92 and 71,567.56

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Solution

The fourth proportional to 128,931.58, 177,922.92 and 71,567.56 is: 98,761.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,931.58 : 177,922.92 = 71,567.56 : x
  2. Step 2: Convert to fraction form
    128,931.58/177,922.92 = 71,567.56/x
  3. Step 3: Cross multiply
    128,931.58x = 177,922.92 × 71,567.56
  4. Step 4: Simplify right side
    128,931.58x = 12,733,509,252.48
  5. Step 5: Solve for x
    x = 12,733,509,252.48/128,931.58
  6. Step 6: Final answer
    x = 98,761.76

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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.