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Finding the Fourth Proportional to 85,429.35, 128,144.03 and 85,429.35

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Solution

The fourth proportional to 85,429.35, 128,144.03 and 85,429.35 is: 128,144.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,429.35 : 128,144.03 = 85,429.35 : x
  2. Step 2: Convert to fraction form
    85,429.35/128,144.03 = 85,429.35/x
  3. Step 3: Cross multiply
    85,429.35x = 128,144.03 × 85,429.35
  4. Step 4: Simplify right side
    85,429.35x = 10,947,260,762.13
  5. Step 5: Solve for x
    x = 10,947,260,762.13/85,429.35
  6. Step 6: Final answer
    x = 128,144.03

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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.