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Finding the Fourth Proportional to 141,805.20, 212,656.60 and 71,661.20

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Solution

The fourth proportional to 141,805.20, 212,656.60 and 71,661.20 is: 107,465.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,805.20 : 212,656.60 = 71,661.20 : x
  2. Step 2: Convert to fraction form
    141,805.20/212,656.60 = 71,661.20/x
  3. Step 3: Cross multiply
    141,805.20x = 212,656.60 × 71,661.20
  4. Step 4: Simplify right side
    141,805.20x = 15,239,227,143.92
  5. Step 5: Solve for x
    x = 15,239,227,143.92/141,805.20
  6. Step 6: Final answer
    x = 107,465.93

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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.