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Finding the Fourth Proportional to 141,755.13, 212,525.80 and 85,581.90

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Solution

The fourth proportional to 141,755.13, 212,525.80 and 85,581.90 is: 128,308.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,755.13 : 212,525.80 = 85,581.90 : x
  2. Step 2: Convert to fraction form
    141,755.13/212,525.80 = 85,581.90/x
  3. Step 3: Cross multiply
    141,755.13x = 212,525.80 × 85,581.90
  4. Step 4: Simplify right side
    141,755.13x = 18,188,361,549.07
  5. Step 5: Solve for x
    x = 18,188,361,549.07/141,755.13
  6. Step 6: Final answer
    x = 128,308.31

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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.