Home / 128,432.01-177,245.52-71,861.61

Finding the Fourth Proportional to 128,432.01, 177,245.52 and 71,861.61

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Solution

The fourth proportional to 128,432.01, 177,245.52 and 71,861.61 is: 99,174.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,432.01 : 177,245.52 = 71,861.61 : x
  2. Step 2: Convert to fraction form
    128,432.01/177,245.52 = 71,861.61/x
  3. Step 3: Cross multiply
    128,432.01x = 177,245.52 × 71,861.61
  4. Step 4: Simplify right side
    128,432.01x = 12,737,148,432.49
  5. Step 5: Solve for x
    x = 12,737,148,432.49/128,432.01
  6. Step 6: Final answer
    x = 99,174.25

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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.