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Finding the Fourth Proportional to 121,133.12, 181,692.12 and 45,216.88

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Solution

The fourth proportional to 121,133.12, 181,692.12 and 45,216.88 is: 67,822.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,133.12 : 181,692.12 = 45,216.88 : x
  2. Step 2: Convert to fraction form
    121,133.12/181,692.12 = 45,216.88/x
  3. Step 3: Cross multiply
    121,133.12x = 181,692.12 × 45,216.88
  4. Step 4: Simplify right side
    121,133.12x = 8,215,550,786.99
  5. Step 5: Solve for x
    x = 8,215,550,786.99/121,133.12
  6. Step 6: Final answer
    x = 67,822.50

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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.