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Finding the Fourth Proportional to 85,771.76, 128,572.50 and 40,714.16

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Solution

The fourth proportional to 85,771.76, 128,572.50 and 40,714.16 is: 61,030.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,771.76 : 128,572.50 = 40,714.16 : x
  2. Step 2: Convert to fraction form
    85,771.76/128,572.50 = 40,714.16/x
  3. Step 3: Cross multiply
    85,771.76x = 128,572.50 × 40,714.16
  4. Step 4: Simplify right side
    85,771.76x = 5,234,721,336.60
  5. Step 5: Solve for x
    x = 5,234,721,336.60/85,771.76
  6. Step 6: Final answer
    x = 61,030.83

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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.