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Finding the Fourth Proportional to 170,861.80, 256,292.70 and 76,091.80

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Solution

The fourth proportional to 170,861.80, 256,292.70 and 76,091.80 is: 114,137.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,861.80 : 256,292.70 = 76,091.80 : x
  2. Step 2: Convert to fraction form
    170,861.80/256,292.70 = 76,091.80/x
  3. Step 3: Cross multiply
    170,861.80x = 256,292.70 × 76,091.80
  4. Step 4: Simplify right side
    170,861.80x = 19,501,772,869.86
  5. Step 5: Solve for x
    x = 19,501,772,869.86/170,861.80
  6. Step 6: Final answer
    x = 114,137.70

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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.