Home / 289,020.90-433,523.20-78,660.66

Finding the Fourth Proportional to 289,020.90, 433,523.20 and 78,660.66

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Solution

The fourth proportional to 289,020.90, 433,523.20 and 78,660.66 is: 117,988.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,020.90 : 433,523.20 = 78,660.66 : x
  2. Step 2: Convert to fraction form
    289,020.90/433,523.20 = 78,660.66/x
  3. Step 3: Cross multiply
    289,020.90x = 433,523.20 × 78,660.66
  4. Step 4: Simplify right side
    289,020.90x = 34,101,221,037.31
  5. Step 5: Solve for x
    x = 34,101,221,037.31/289,020.90
  6. Step 6: Final answer
    x = 117,988.77

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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.