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Finding the Fourth Proportional to 85,363.80, 128,045.70 and 41,077.05

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Solution

The fourth proportional to 85,363.80, 128,045.70 and 41,077.05 is: 61,615.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,363.80 : 128,045.70 = 41,077.05 : x
  2. Step 2: Convert to fraction form
    85,363.80/128,045.70 = 41,077.05/x
  3. Step 3: Cross multiply
    85,363.80x = 128,045.70 × 41,077.05
  4. Step 4: Simplify right side
    85,363.80x = 5,259,739,621.19
  5. Step 5: Solve for x
    x = 5,259,739,621.19/85,363.80
  6. Step 6: Final answer
    x = 61,615.58

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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.