Home / 85,427.10-128,142.68-26,263.31

Finding the Fourth Proportional to 85,427.10, 128,142.68 and 26,263.31

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Solution

The fourth proportional to 85,427.10, 128,142.68 and 26,263.31 is: 39,395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.10 : 128,142.68 = 26,263.31 : x
  2. Step 2: Convert to fraction form
    85,427.10/128,142.68 = 26,263.31/x
  3. Step 3: Cross multiply
    85,427.10x = 128,142.68 × 26,263.31
  4. Step 4: Simplify right side
    85,427.10x = 3,365,450,157.04
  5. Step 5: Solve for x
    x = 3,365,450,157.04/85,427.10
  6. Step 6: Final answer
    x = 39,395.58

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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.