Home / 128,440.08-177,244.20-71,853.48

Finding the Fourth Proportional to 128,440.08, 177,244.20 and 71,853.48

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Solution

The fourth proportional to 128,440.08, 177,244.20 and 71,853.48 is: 99,156.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.08 : 177,244.20 = 71,853.48 : x
  2. Step 2: Convert to fraction form
    128,440.08/177,244.20 = 71,853.48/x
  3. Step 3: Cross multiply
    128,440.08x = 177,244.20 × 71,853.48
  4. Step 4: Simplify right side
    128,440.08x = 12,735,612,579.82
  5. Step 5: Solve for x
    x = 12,735,612,579.82/128,440.08
  6. Step 6: Final answer
    x = 99,156.06

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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.