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Finding the Fourth Proportional to 120,956.65, 166,940.80 and 70,000.40

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Solution

The fourth proportional to 120,956.65, 166,940.80 and 70,000.40 is: 96,612.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,956.65 : 166,940.80 = 70,000.40 : x
  2. Step 2: Convert to fraction form
    120,956.65/166,940.80 = 70,000.40/x
  3. Step 3: Cross multiply
    120,956.65x = 166,940.80 × 70,000.40
  4. Step 4: Simplify right side
    120,956.65x = 11,685,923,240.16
  5. Step 5: Solve for x
    x = 11,685,923,240.16/120,956.65
  6. Step 6: Final answer
    x = 96,612.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.