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Finding the Fourth Proportional to 97,781.80, 146,964.30 and 84,951.40

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Solution

The fourth proportional to 97,781.80, 146,964.30 and 84,951.40 is: 127,680.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,781.80 : 146,964.30 = 84,951.40 : x
  2. Step 2: Convert to fraction form
    97,781.80/146,964.30 = 84,951.40/x
  3. Step 3: Cross multiply
    97,781.80x = 146,964.30 × 84,951.40
  4. Step 4: Simplify right side
    97,781.80x = 12,484,823,035.02
  5. Step 5: Solve for x
    x = 12,484,823,035.02/97,781.80
  6. Step 6: Final answer
    x = 127,680.44

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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.