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Finding the Fourth Proportional to 141,991.62, 212,987.35 and 42,151.74

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Solution

The fourth proportional to 141,991.62, 212,987.35 and 42,151.74 is: 63,227.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,991.62 : 212,987.35 = 42,151.74 : x
  2. Step 2: Convert to fraction form
    141,991.62/212,987.35 = 42,151.74/x
  3. Step 3: Cross multiply
    141,991.62x = 212,987.35 × 42,151.74
  4. Step 4: Simplify right side
    141,991.62x = 8,977,787,400.49
  5. Step 5: Solve for x
    x = 8,977,787,400.49/141,991.62
  6. Step 6: Final answer
    x = 63,227.59

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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.