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Finding the Fourth Proportional to 85,887.70, 128,841.15 and 26,722.90

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Solution

The fourth proportional to 85,887.70, 128,841.15 and 26,722.90 is: 40,087.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,887.70 : 128,841.15 = 26,722.90 : x
  2. Step 2: Convert to fraction form
    85,887.70/128,841.15 = 26,722.90/x
  3. Step 3: Cross multiply
    85,887.70x = 128,841.15 × 26,722.90
  4. Step 4: Simplify right side
    85,887.70x = 3,443,009,167.34
  5. Step 5: Solve for x
    x = 3,443,009,167.34/85,887.70
  6. Step 6: Final answer
    x = 40,087.34

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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.