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Finding the Fourth Proportional to 85,758.80, 128,361.72 and 44,148.56

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Solution

The fourth proportional to 85,758.80, 128,361.72 and 44,148.56 is: 66,080.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,758.80 : 128,361.72 = 44,148.56 : x
  2. Step 2: Convert to fraction form
    85,758.80/128,361.72 = 44,148.56/x
  3. Step 3: Cross multiply
    85,758.80x = 128,361.72 × 44,148.56
  4. Step 4: Simplify right side
    85,758.80x = 5,666,985,097.12
  5. Step 5: Solve for x
    x = 5,666,985,097.12/85,758.80
  6. Step 6: Final answer
    x = 66,080.51

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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.