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Finding the Fourth Proportional to 111,618.80, 167,428.20 and 72,220.40

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Solution

The fourth proportional to 111,618.80, 167,428.20 and 72,220.40 is: 108,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,618.80 : 167,428.20 = 72,220.40 : x
  2. Step 2: Convert to fraction form
    111,618.80/167,428.20 = 72,220.40/x
  3. Step 3: Cross multiply
    111,618.80x = 167,428.20 × 72,220.40
  4. Step 4: Simplify right side
    111,618.80x = 12,091,731,575.28
  5. Step 5: Solve for x
    x = 12,091,731,575.28/111,618.80
  6. Step 6: Final answer
    x = 108,330.60

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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.