Home / 128,819.45-177,709.63-85,818.93

Finding the Fourth Proportional to 128,819.45, 177,709.63 and 85,818.93

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Solution

The fourth proportional to 128,819.45, 177,709.63 and 85,818.93 is: 118,389.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819.45 : 177,709.63 = 85,818.93 : x
  2. Step 2: Convert to fraction form
    128,819.45/177,709.63 = 85,818.93/x
  3. Step 3: Cross multiply
    128,819.45x = 177,709.63 × 85,818.93
  4. Step 4: Simplify right side
    128,819.45x = 15,250,850,297.30
  5. Step 5: Solve for x
    x = 15,250,850,297.30/128,819.45
  6. Step 6: Final answer
    x = 118,389.34

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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.