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Finding the Fourth Proportional to 122,109.72, 168,511.42 and 74,363.07

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Solution

The fourth proportional to 122,109.72, 168,511.42 and 74,363.07 is: 102,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,109.72 : 168,511.42 = 74,363.07 : x
  2. Step 2: Convert to fraction form
    122,109.72/168,511.42 = 74,363.07/x
  3. Step 3: Cross multiply
    122,109.72x = 168,511.42 × 74,363.07
  4. Step 4: Simplify right side
    122,109.72x = 12,531,026,933.24
  5. Step 5: Solve for x
    x = 12,531,026,933.24/122,109.72
  6. Step 6: Final answer
    x = 102,621.04

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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.