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Finding the Fourth Proportional to 141,881.20, 212,821.80 and 129,900.40

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Solution

The fourth proportional to 141,881.20, 212,821.80 and 129,900.40 is: 194,850.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,881.20 : 212,821.80 = 129,900.40 : x
  2. Step 2: Convert to fraction form
    141,881.20/212,821.80 = 129,900.40/x
  3. Step 3: Cross multiply
    141,881.20x = 212,821.80 × 129,900.40
  4. Step 4: Simplify right side
    141,881.20x = 27,645,636,948.72
  5. Step 5: Solve for x
    x = 27,645,636,948.72/141,881.20
  6. Step 6: Final answer
    x = 194,850.60

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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.