Home / 85,529.10-128,305.80-26,358.60

Finding the Fourth Proportional to 85,529.10, 128,305.80 and 26,358.60

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Solution

The fourth proportional to 85,529.10, 128,305.80 and 26,358.60 is: 39,541.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,529.10 : 128,305.80 = 26,358.60 : x
  2. Step 2: Convert to fraction form
    85,529.10/128,305.80 = 26,358.60/x
  3. Step 3: Cross multiply
    85,529.10x = 128,305.80 × 26,358.60
  4. Step 4: Simplify right side
    85,529.10x = 3,381,961,259.88
  5. Step 5: Solve for x
    x = 3,381,961,259.88/85,529.10
  6. Step 6: Final answer
    x = 39,541.64

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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.