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Finding the Fourth Proportional to 67,428.80, 100,912.80 and 59,134.40

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Solution

The fourth proportional to 67,428.80, 100,912.80 and 59,134.40 is: 88,499.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,428.80 : 100,912.80 = 59,134.40 : x
  2. Step 2: Convert to fraction form
    67,428.80/100,912.80 = 59,134.40/x
  3. Step 3: Cross multiply
    67,428.80x = 100,912.80 × 59,134.40
  4. Step 4: Simplify right side
    67,428.80x = 5,967,417,880.32
  5. Step 5: Solve for x
    x = 5,967,417,880.32/67,428.80
  6. Step 6: Final answer
    x = 88,499.54

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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.