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Finding the Fourth Proportional to 85,336.10, 128,109.45 and 53,746.10

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Solution

The fourth proportional to 85,336.10, 128,109.45 and 53,746.10 is: 80,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,336.10 : 128,109.45 = 53,746.10 : x
  2. Step 2: Convert to fraction form
    85,336.10/128,109.45 = 53,746.10/x
  3. Step 3: Cross multiply
    85,336.10x = 128,109.45 × 53,746.10
  4. Step 4: Simplify right side
    85,336.10x = 6,885,383,310.65
  5. Step 5: Solve for x
    x = 6,885,383,310.65/85,336.10
  6. Step 6: Final answer
    x = 80,685.47

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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.