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Finding the Fourth Proportional to 85,655.39, 128,495.41 and 26,495.64

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Solution

The fourth proportional to 85,655.39, 128,495.41 and 26,495.64 is: 39,747.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.39 : 128,495.41 = 26,495.64 : x
  2. Step 2: Convert to fraction form
    85,655.39/128,495.41 = 26,495.64/x
  3. Step 3: Cross multiply
    85,655.39x = 128,495.41 × 26,495.64
  4. Step 4: Simplify right side
    85,655.39x = 3,404,568,058.77
  5. Step 5: Solve for x
    x = 3,404,568,058.77/85,655.39
  6. Step 6: Final answer
    x = 39,747.27

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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.