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Finding the Fourth Proportional to 120,903.20, 181,009.20 and 108,461.60

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Solution

The fourth proportional to 120,903.20, 181,009.20 and 108,461.60 is: 162,382.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,903.20 : 181,009.20 = 108,461.60 : x
  2. Step 2: Convert to fraction form
    120,903.20/181,009.20 = 108,461.60/x
  3. Step 3: Cross multiply
    120,903.20x = 181,009.20 × 108,461.60
  4. Step 4: Simplify right side
    120,903.20x = 19,632,547,446.72
  5. Step 5: Solve for x
    x = 19,632,547,446.72/120,903.20
  6. Step 6: Final answer
    x = 162,382.36

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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.