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Finding the Fourth Proportional to 85,554.90, 128,346.90 and 26,379.54

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Solution

The fourth proportional to 85,554.90, 128,346.90 and 26,379.54 is: 39,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,554.90 : 128,346.90 = 26,379.54 : x
  2. Step 2: Convert to fraction form
    85,554.90/128,346.90 = 26,379.54/x
  3. Step 3: Cross multiply
    85,554.90x = 128,346.90 × 26,379.54
  4. Step 4: Simplify right side
    85,554.90x = 3,385,732,182.43
  5. Step 5: Solve for x
    x = 3,385,732,182.43/85,554.90
  6. Step 6: Final answer
    x = 39,573.80

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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.