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Finding the Fourth Proportional to 129,820.40, 194,730.60 and 70,625.60

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Solution

The fourth proportional to 129,820.40, 194,730.60 and 70,625.60 is: 105,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,820.40 : 194,730.60 = 70,625.60 : x
  2. Step 2: Convert to fraction form
    129,820.40/194,730.60 = 70,625.60/x
  3. Step 3: Cross multiply
    129,820.40x = 194,730.60 × 70,625.60
  4. Step 4: Simplify right side
    129,820.40x = 13,752,965,463.36
  5. Step 5: Solve for x
    x = 13,752,965,463.36/129,820.40
  6. Step 6: Final answer
    x = 105,938.40

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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.