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Finding the Fourth Proportional to 85,577.58, 128,378.67 and 26,418.32

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Solution

The fourth proportional to 85,577.58, 128,378.67 and 26,418.32 is: 39,631.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,577.58 : 128,378.67 = 26,418.32 : x
  2. Step 2: Convert to fraction form
    85,577.58/128,378.67 = 26,418.32/x
  3. Step 3: Cross multiply
    85,577.58x = 128,378.67 × 26,418.32
  4. Step 4: Simplify right side
    85,577.58x = 3,391,548,143.34
  5. Step 5: Solve for x
    x = 3,391,548,143.34/85,577.58
  6. Step 6: Final answer
    x = 39,631.27

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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.