Home / 128,819.77-177,584.40-90,462.52

Finding the Fourth Proportional to 128,819.77, 177,584.40 and 90,462.52

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Solution

The fourth proportional to 128,819.77, 177,584.40 and 90,462.52 is: 124,707.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819.77 : 177,584.40 = 90,462.52 : x
  2. Step 2: Convert to fraction form
    128,819.77/177,584.40 = 90,462.52/x
  3. Step 3: Cross multiply
    128,819.77x = 177,584.40 × 90,462.52
  4. Step 4: Simplify right side
    128,819.77x = 16,064,732,558.67
  5. Step 5: Solve for x
    x = 16,064,732,558.67/128,819.77
  6. Step 6: Final answer
    x = 124,707.05

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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.