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Finding the Fourth Proportional to 281,987.85, 423,006.65 and 79,585.77

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Solution

The fourth proportional to 281,987.85, 423,006.65 and 79,585.77 is: 119,385.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,987.85 : 423,006.65 = 79,585.77 : x
  2. Step 2: Convert to fraction form
    281,987.85/423,006.65 = 79,585.77/x
  3. Step 3: Cross multiply
    281,987.85x = 423,006.65 × 79,585.77
  4. Step 4: Simplify right side
    281,987.85x = 33,665,309,557.44
  5. Step 5: Solve for x
    x = 33,665,309,557.44/281,987.85
  6. Step 6: Final answer
    x = 119,385.67

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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.