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Finding the Fourth Proportional to 85,653.05, 128,485.65 and 26,493.49

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Solution

The fourth proportional to 85,653.05, 128,485.65 and 26,493.49 is: 39,742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,653.05 : 128,485.65 = 26,493.49 : x
  2. Step 2: Convert to fraction form
    85,653.05/128,485.65 = 26,493.49/x
  3. Step 3: Cross multiply
    85,653.05x = 128,485.65 × 26,493.49
  4. Step 4: Simplify right side
    85,653.05x = 3,404,032,640.99
  5. Step 5: Solve for x
    x = 3,404,032,640.99/85,653.05
  6. Step 6: Final answer
    x = 39,742.11

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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.