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Finding the Fourth Proportional to 120,992.40, 181,488.60 and 120,214.80

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Solution

The fourth proportional to 120,992.40, 181,488.60 and 120,214.80 is: 180,322.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,992.40 : 181,488.60 = 120,214.80 : x
  2. Step 2: Convert to fraction form
    120,992.40/181,488.60 = 120,214.80/x
  3. Step 3: Cross multiply
    120,992.40x = 181,488.60 × 120,214.80
  4. Step 4: Simplify right side
    120,992.40x = 21,817,615,751.28
  5. Step 5: Solve for x
    x = 21,817,615,751.28/120,992.40
  6. Step 6: Final answer
    x = 180,322.20

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1.5x scale

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.