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Finding the Fourth Proportional to 141,300.45, 212,114.70 and 85,203.90

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Solution

The fourth proportional to 141,300.45, 212,114.70 and 85,203.90 is: 127,904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,300.45 : 212,114.70 = 85,203.90 : x
  2. Step 2: Convert to fraction form
    141,300.45/212,114.70 = 85,203.90/x
  3. Step 3: Cross multiply
    141,300.45x = 212,114.70 × 85,203.90
  4. Step 4: Simplify right side
    141,300.45x = 18,072,999,687.33
  5. Step 5: Solve for x
    x = 18,072,999,687.33/141,300.45
  6. Step 6: Final answer
    x = 127,904.76

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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.