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Finding the Fourth Proportional to 105,907.79, 158,898.14 and 66,418.67

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Solution

The fourth proportional to 105,907.79, 158,898.14 and 66,418.67 is: 99,650.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,907.79 : 158,898.14 = 66,418.67 : x
  2. Step 2: Convert to fraction form
    105,907.79/158,898.14 = 66,418.67/x
  3. Step 3: Cross multiply
    105,907.79x = 158,898.14 × 66,418.67
  4. Step 4: Simplify right side
    105,907.79x = 10,553,803,124.27
  5. Step 5: Solve for x
    x = 10,553,803,124.27/105,907.79
  6. Step 6: Final answer
    x = 99,650.87

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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.