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Finding the Fourth Proportional to 85,751.70, 128,627.61 and 35,804.55

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Solution

The fourth proportional to 85,751.70, 128,627.61 and 35,804.55 is: 53,706.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,751.70 : 128,627.61 = 35,804.55 : x
  2. Step 2: Convert to fraction form
    85,751.70/128,627.61 = 35,804.55/x
  3. Step 3: Cross multiply
    85,751.70x = 128,627.61 × 35,804.55
  4. Step 4: Simplify right side
    85,751.70x = 4,605,453,693.63
  5. Step 5: Solve for x
    x = 4,605,453,693.63/85,751.70
  6. Step 6: Final answer
    x = 53,706.85

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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.