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Finding the Fourth Proportional to 141,878.40, 212,720.40 and 67,034.40

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Solution

The fourth proportional to 141,878.40, 212,720.40 and 67,034.40 is: 100,505.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,878.40 : 212,720.40 = 67,034.40 : x
  2. Step 2: Convert to fraction form
    141,878.40/212,720.40 = 67,034.40/x
  3. Step 3: Cross multiply
    141,878.40x = 212,720.40 × 67,034.40
  4. Step 4: Simplify right side
    141,878.40x = 14,259,584,381.76
  5. Step 5: Solve for x
    x = 14,259,584,381.76/141,878.40
  6. Step 6: Final answer
    x = 100,505.68

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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.