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Finding the Fourth Proportional to 173,728.40, 260,738.40 and 85,057.70

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Solution

The fourth proportional to 173,728.40, 260,738.40 and 85,057.70 is: 127,657.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,728.40 : 260,738.40 = 85,057.70 : x
  2. Step 2: Convert to fraction form
    173,728.40/260,738.40 = 85,057.70/x
  3. Step 3: Cross multiply
    173,728.40x = 260,738.40 × 85,057.70
  4. Step 4: Simplify right side
    173,728.40x = 22,177,808,605.68
  5. Step 5: Solve for x
    x = 22,177,808,605.68/173,728.40
  6. Step 6: Final answer
    x = 127,657.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.