Home / 128,583.78-177,444.42-71,996.10

Finding the Fourth Proportional to 128,583.78, 177,444.42 and 71,996.10

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Solution

The fourth proportional to 128,583.78, 177,444.42 and 71,996.10 is: 99,353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,583.78 : 177,444.42 = 71,996.10 : x
  2. Step 2: Convert to fraction form
    128,583.78/177,444.42 = 71,996.10/x
  3. Step 3: Cross multiply
    128,583.78x = 177,444.42 × 71,996.10
  4. Step 4: Simplify right side
    128,583.78x = 12,775,306,206.76
  5. Step 5: Solve for x
    x = 12,775,306,206.76/128,583.78
  6. Step 6: Final answer
    x = 99,353.95

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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.