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Finding the Fourth Proportional to 111,697.20, 167,254.20 and 72,039.60

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Solution

The fourth proportional to 111,697.20, 167,254.20 and 72,039.60 is: 107,871.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,697.20 : 167,254.20 = 72,039.60 : x
  2. Step 2: Convert to fraction form
    111,697.20/167,254.20 = 72,039.60/x
  3. Step 3: Cross multiply
    111,697.20x = 167,254.20 × 72,039.60
  4. Step 4: Simplify right side
    111,697.20x = 12,048,925,666.32
  5. Step 5: Solve for x
    x = 12,048,925,666.32/111,697.20
  6. Step 6: Final answer
    x = 107,871.33

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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.