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Finding the Fourth Proportional to 280,771.83, 421,095.90 and 81,048.84

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Solution

The fourth proportional to 280,771.83, 421,095.90 and 81,048.84 is: 121,555.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,771.83 : 421,095.90 = 81,048.84 : x
  2. Step 2: Convert to fraction form
    280,771.83/421,095.90 = 81,048.84/x
  3. Step 3: Cross multiply
    280,771.83x = 421,095.90 × 81,048.84
  4. Step 4: Simplify right side
    280,771.83x = 34,129,334,223.76
  5. Step 5: Solve for x
    x = 34,129,334,223.76/280,771.83
  6. Step 6: Final answer
    x = 121,555.41

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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.