Home / 85,576.64-128,365.50-56,019.28

Finding the Fourth Proportional to 85,576.64, 128,365.50 and 56,019.28

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Solution

The fourth proportional to 85,576.64, 128,365.50 and 56,019.28 is: 84,029.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,576.64 : 128,365.50 = 56,019.28 : x
  2. Step 2: Convert to fraction form
    85,576.64/128,365.50 = 56,019.28/x
  3. Step 3: Cross multiply
    85,576.64x = 128,365.50 × 56,019.28
  4. Step 4: Simplify right side
    85,576.64x = 7,190,942,886.84
  5. Step 5: Solve for x
    x = 7,190,942,886.84/85,576.64
  6. Step 6: Final answer
    x = 84,029.27

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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.