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Finding the Fourth Proportional to 141,923.58, 212,644.45 and 85,645.45

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Solution

The fourth proportional to 141,923.58, 212,644.45 and 85,645.45 is: 128,322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,923.58 : 212,644.45 = 85,645.45 : x
  2. Step 2: Convert to fraction form
    141,923.58/212,644.45 = 85,645.45/x
  3. Step 3: Cross multiply
    141,923.58x = 212,644.45 × 85,645.45
  4. Step 4: Simplify right side
    141,923.58x = 18,212,029,610.25
  5. Step 5: Solve for x
    x = 18,212,029,610.25/141,923.58
  6. Step 6: Final answer
    x = 128,322.79

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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.