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Finding the Fourth Proportional to 85,410.85, 128,194.67 and 43,320.24

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Solution

The fourth proportional to 85,410.85, 128,194.67 and 43,320.24 is: 65,020.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.85 : 128,194.67 = 43,320.24 : x
  2. Step 2: Convert to fraction form
    85,410.85/128,194.67 = 43,320.24/x
  3. Step 3: Cross multiply
    85,410.85x = 128,194.67 × 43,320.24
  4. Step 4: Simplify right side
    85,410.85x = 5,553,423,871.12
  5. Step 5: Solve for x
    x = 5,553,423,871.12/85,410.85
  6. Step 6: Final answer
    x = 65,020.12

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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.