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Finding the Fourth Proportional to 280,089.50, 420,133.55 and 120,061.67

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Solution

The fourth proportional to 280,089.50, 420,133.55 and 120,061.67 is: 180,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,089.50 : 420,133.55 = 120,061.67 : x
  2. Step 2: Convert to fraction form
    280,089.50/420,133.55 = 120,061.67/x
  3. Step 3: Cross multiply
    280,089.50x = 420,133.55 × 120,061.67
  4. Step 4: Simplify right side
    280,089.50x = 50,441,932,935.05
  5. Step 5: Solve for x
    x = 50,441,932,935.05/280,089.50
  6. Step 6: Final answer
    x = 180,092.20

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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.