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Finding the Fourth Proportional to 131,708, 197,579.36 and 42,930.40

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Solution

The fourth proportional to 131,708, 197,579.36 and 42,930.40 is: 64,401.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,708 : 197,579.36 = 42,930.40 : x
  2. Step 2: Convert to fraction form
    131,708/197,579.36 = 42,930.40/x
  3. Step 3: Cross multiply
    131,708x = 197,579.36 × 42,930.40
  4. Step 4: Simplify right side
    131,708x = 8,482,160,956.54
  5. Step 5: Solve for x
    x = 8,482,160,956.54/131,708
  6. Step 6: Final answer
    x = 64,401.26

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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.