Home / 85,545.45-128,274.84-40,553.19

Finding the Fourth Proportional to 85,545.45, 128,274.84 and 40,553.19

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Solution

The fourth proportional to 85,545.45, 128,274.84 and 40,553.19 is: 60,809.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,545.45 : 128,274.84 = 40,553.19 : x
  2. Step 2: Convert to fraction form
    85,545.45/128,274.84 = 40,553.19/x
  3. Step 3: Cross multiply
    85,545.45x = 128,274.84 × 40,553.19
  4. Step 4: Simplify right side
    85,545.45x = 5,201,953,958.74
  5. Step 5: Solve for x
    x = 5,201,953,958.74/85,545.45
  6. Step 6: Final answer
    x = 60,809.24

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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.