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Finding the Fourth Proportional to 85,696.80, 128,560.80 and 29,544.96

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Solution

The fourth proportional to 85,696.80, 128,560.80 and 29,544.96 is: 44,322.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,696.80 : 128,560.80 = 29,544.96 : x
  2. Step 2: Convert to fraction form
    85,696.80/128,560.80 = 29,544.96/x
  3. Step 3: Cross multiply
    85,696.80x = 128,560.80 × 29,544.96
  4. Step 4: Simplify right side
    85,696.80x = 3,798,323,693.57
  5. Step 5: Solve for x
    x = 3,798,323,693.57/85,696.80
  6. Step 6: Final answer
    x = 44,322.82

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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.