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Finding the Fourth Proportional to 120,970.20, 181,109.70 and 108,528.60

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Solution

The fourth proportional to 120,970.20, 181,109.70 and 108,528.60 is: 162,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,970.20 : 181,109.70 = 108,528.60 : x
  2. Step 2: Convert to fraction form
    120,970.20/181,109.70 = 108,528.60/x
  3. Step 3: Cross multiply
    120,970.20x = 181,109.70 × 108,528.60
  4. Step 4: Simplify right side
    120,970.20x = 19,655,582,187.42
  5. Step 5: Solve for x
    x = 19,655,582,187.42/120,970.20
  6. Step 6: Final answer
    x = 162,482.84

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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.