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Finding the Fourth Proportional to 85,560.40, 128,340.60 and 35,623.90

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Solution

The fourth proportional to 85,560.40, 128,340.60 and 35,623.90 is: 53,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,560.40 : 128,340.60 = 35,623.90 : x
  2. Step 2: Convert to fraction form
    85,560.40/128,340.60 = 35,623.90/x
  3. Step 3: Cross multiply
    85,560.40x = 128,340.60 × 35,623.90
  4. Step 4: Simplify right side
    85,560.40x = 4,571,992,700.34
  5. Step 5: Solve for x
    x = 4,571,992,700.34/85,560.40
  6. Step 6: Final answer
    x = 53,435.85

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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.