Home / 85,505.10-128,269.80-26,334.60

Finding the Fourth Proportional to 85,505.10, 128,269.80 and 26,334.60

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Solution

The fourth proportional to 85,505.10, 128,269.80 and 26,334.60 is: 39,505.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.10 : 128,269.80 = 26,334.60 : x
  2. Step 2: Convert to fraction form
    85,505.10/128,269.80 = 26,334.60/x
  3. Step 3: Cross multiply
    85,505.10x = 128,269.80 × 26,334.60
  4. Step 4: Simplify right side
    85,505.10x = 3,377,933,875.08
  5. Step 5: Solve for x
    x = 3,377,933,875.08/85,505.10
  6. Step 6: Final answer
    x = 39,505.64

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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.