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Finding the Fourth Proportional to 110,114.10, 151,981.65 and 72,391.86

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Solution

The fourth proportional to 110,114.10, 151,981.65 and 72,391.86 is: 99,916.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,114.10 : 151,981.65 = 72,391.86 : x
  2. Step 2: Convert to fraction form
    110,114.10/151,981.65 = 72,391.86/x
  3. Step 3: Cross multiply
    110,114.10x = 151,981.65 × 72,391.86
  4. Step 4: Simplify right side
    110,114.10x = 11,002,234,329.37
  5. Step 5: Solve for x
    x = 11,002,234,329.37/110,114.10
  6. Step 6: Final answer
    x = 99,916.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.