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Finding the Fourth Proportional to 121,438.80, 182,158.20 and 68,950.80

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Solution

The fourth proportional to 121,438.80, 182,158.20 and 68,950.80 is: 103,426.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,438.80 : 182,158.20 = 68,950.80 : x
  2. Step 2: Convert to fraction form
    121,438.80/182,158.20 = 68,950.80/x
  3. Step 3: Cross multiply
    121,438.80x = 182,158.20 × 68,950.80
  4. Step 4: Simplify right side
    121,438.80x = 12,559,953,616.56
  5. Step 5: Solve for x
    x = 12,559,953,616.56/121,438.80
  6. Step 6: Final answer
    x = 103,426.20

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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.