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Finding the Fourth Proportional to 122,420.32, 168,877.08 and 81,654.64

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Solution

The fourth proportional to 122,420.32, 168,877.08 and 81,654.64 is: 112,641.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,420.32 : 168,877.08 = 81,654.64 : x
  2. Step 2: Convert to fraction form
    122,420.32/168,877.08 = 81,654.64/x
  3. Step 3: Cross multiply
    122,420.32x = 168,877.08 × 81,654.64
  4. Step 4: Simplify right side
    122,420.32x = 13,789,597,171.65
  5. Step 5: Solve for x
    x = 13,789,597,171.65/122,420.32
  6. Step 6: Final answer
    x = 112,641.41

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1.5x scale

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.