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Finding the Fourth Proportional to 111,510.78, 167,029.21 and 75,509.11

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Solution

The fourth proportional to 111,510.78, 167,029.21 and 75,509.11 is: 113,103.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,510.78 : 167,029.21 = 75,509.11 : x
  2. Step 2: Convert to fraction form
    111,510.78/167,029.21 = 75,509.11/x
  3. Step 3: Cross multiply
    111,510.78x = 167,029.21 × 75,509.11
  4. Step 4: Simplify right side
    111,510.78x = 12,612,226,991.10
  5. Step 5: Solve for x
    x = 12,612,226,991.10/111,510.78
  6. Step 6: Final answer
    x = 113,103.21

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1.5x scale

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.