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Finding the Fourth Proportional to 281,335.81, 421,977.51 and 78,950.83

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Solution

The fourth proportional to 281,335.81, 421,977.51 and 78,950.83 is: 118,418.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,335.81 : 421,977.51 = 78,950.83 : x
  2. Step 2: Convert to fraction form
    281,335.81/421,977.51 = 78,950.83/x
  3. Step 3: Cross multiply
    281,335.81x = 421,977.51 × 78,950.83
  4. Step 4: Simplify right side
    281,335.81x = 33,315,474,261.08
  5. Step 5: Solve for x
    x = 33,315,474,261.08/281,335.81
  6. Step 6: Final answer
    x = 118,418.89

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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.