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Finding the Fourth Proportional to 120,750.20, 181,125.30 and 83,425.40

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Solution

The fourth proportional to 120,750.20, 181,125.30 and 83,425.40 is: 125,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,750.20 : 181,125.30 = 83,425.40 : x
  2. Step 2: Convert to fraction form
    120,750.20/181,125.30 = 83,425.40/x
  3. Step 3: Cross multiply
    120,750.20x = 181,125.30 × 83,425.40
  4. Step 4: Simplify right side
    120,750.20x = 15,110,450,602.62
  5. Step 5: Solve for x
    x = 15,110,450,602.62/120,750.20
  6. Step 6: Final answer
    x = 125,138.10

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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.