Home / 128,493.85-177,151.63-105,439.23

Finding the Fourth Proportional to 128,493.85, 177,151.63 and 105,439.23

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Solution

The fourth proportional to 128,493.85, 177,151.63 and 105,439.23 is: 145,366.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,493.85 : 177,151.63 = 105,439.23 : x
  2. Step 2: Convert to fraction form
    128,493.85/177,151.63 = 105,439.23/x
  3. Step 3: Cross multiply
    128,493.85x = 177,151.63 × 105,439.23
  4. Step 4: Simplify right side
    128,493.85x = 18,678,731,460.44
  5. Step 5: Solve for x
    x = 18,678,731,460.44/128,493.85
  6. Step 6: Final answer
    x = 145,366.74

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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.