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Finding the Fourth Proportional to 120,967.20, 181,450.80 and 87,530.40

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Solution

The fourth proportional to 120,967.20, 181,450.80 and 87,530.40 is: 131,295.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,967.20 : 181,450.80 = 87,530.40 : x
  2. Step 2: Convert to fraction form
    120,967.20/181,450.80 = 87,530.40/x
  3. Step 3: Cross multiply
    120,967.20x = 181,450.80 × 87,530.40
  4. Step 4: Simplify right side
    120,967.20x = 15,882,461,104.32
  5. Step 5: Solve for x
    x = 15,882,461,104.32/120,967.20
  6. Step 6: Final answer
    x = 131,295.60

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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.