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Finding the Fourth Proportional to 128,471.05, 177,311.04 and 88,151.54

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Solution

The fourth proportional to 128,471.05, 177,311.04 and 88,151.54 is: 121,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,471.05 : 177,311.04 = 88,151.54 : x
  2. Step 2: Convert to fraction form
    128,471.05/177,311.04 = 88,151.54/x
  3. Step 3: Cross multiply
    128,471.05x = 177,311.04 × 88,151.54
  4. Step 4: Simplify right side
    128,471.05x = 15,630,241,235.00
  5. Step 5: Solve for x
    x = 15,630,241,235.00/128,471.05
  6. Step 6: Final answer
    x = 121,663.53

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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.