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Finding the Fourth Proportional to 130,680, 196,020 and 56,808

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Solution

The fourth proportional to 130,680, 196,020 and 56,808 is: 85,212

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,680 : 196,020 = 56,808 : x
  2. Step 2: Convert to fraction form
    130,680/196,020 = 56,808/x
  3. Step 3: Cross multiply
    130,680x = 196,020 × 56,808
  4. Step 4: Simplify right side
    130,680x = 11,135,504,160
  5. Step 5: Solve for x
    x = 11,135,504,160/130,680
  6. Step 6: Final answer
    x = 85,212

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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.