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Finding the Fourth Proportional to 289,555.92, 434,285.28 and 79,156.80

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Solution

The fourth proportional to 289,555.92, 434,285.28 and 79,156.80 is: 118,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,555.92 : 434,285.28 = 79,156.80 : x
  2. Step 2: Convert to fraction form
    289,555.92/434,285.28 = 79,156.80/x
  3. Step 3: Cross multiply
    289,555.92x = 434,285.28 × 79,156.80
  4. Step 4: Simplify right side
    289,555.92x = 34,376,633,051.90
  5. Step 5: Solve for x
    x = 34,376,633,051.90/289,555.92
  6. Step 6: Final answer
    x = 118,721.91

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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.