Home / 128,586.06-177,444.86-71,223.12

Finding the Fourth Proportional to 128,586.06, 177,444.86 and 71,223.12

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Solution

The fourth proportional to 128,586.06, 177,444.86 and 71,223.12 is: 98,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,586.06 : 177,444.86 = 71,223.12 : x
  2. Step 2: Convert to fraction form
    128,586.06/177,444.86 = 71,223.12/x
  3. Step 3: Cross multiply
    128,586.06x = 177,444.86 × 71,223.12
  4. Step 4: Simplify right side
    128,586.06x = 12,638,176,201.05
  5. Step 5: Solve for x
    x = 12,638,176,201.05/128,586.06
  6. Step 6: Final answer
    x = 98,285.74

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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.