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Finding the Fourth Proportional to 128,173.89, 176,895.06 and 106,625.61

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Solution

The fourth proportional to 128,173.89, 176,895.06 and 106,625.61 is: 147,155.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,173.89 : 176,895.06 = 106,625.61 : x
  2. Step 2: Convert to fraction form
    128,173.89/176,895.06 = 106,625.61/x
  3. Step 3: Cross multiply
    128,173.89x = 176,895.06 × 106,625.61
  4. Step 4: Simplify right side
    128,173.89x = 18,861,543,678.49
  5. Step 5: Solve for x
    x = 18,861,543,678.49/128,173.89
  6. Step 6: Final answer
    x = 147,155.90

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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.