Home / 85,670.40-128,542.20-35,761.56

Finding the Fourth Proportional to 85,670.40, 128,542.20 and 35,761.56

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Solution

The fourth proportional to 85,670.40, 128,542.20 and 35,761.56 is: 53,657.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,670.40 : 128,542.20 = 35,761.56 : x
  2. Step 2: Convert to fraction form
    85,670.40/128,542.20 = 35,761.56/x
  3. Step 3: Cross multiply
    85,670.40x = 128,542.20 × 35,761.56
  4. Step 4: Simplify right side
    85,670.40x = 4,596,869,597.83
  5. Step 5: Solve for x
    x = 4,596,869,597.83/85,670.40
  6. Step 6: Final answer
    x = 53,657.62

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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.