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Finding the Fourth Proportional to 85,876.22, 128,836.30 and 26,712.40

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Solution

The fourth proportional to 85,876.22, 128,836.30 and 26,712.40 is: 40,075.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,876.22 : 128,836.30 = 26,712.40 : x
  2. Step 2: Convert to fraction form
    85,876.22/128,836.30 = 26,712.40/x
  3. Step 3: Cross multiply
    85,876.22x = 128,836.30 × 26,712.40
  4. Step 4: Simplify right side
    85,876.22x = 3,441,526,780.12
  5. Step 5: Solve for x
    x = 3,441,526,780.12/85,876.22
  6. Step 6: Final answer
    x = 40,075.43

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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.