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Finding the Fourth Proportional to 100,069.72, 149,937.96 and 70,425.34

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Solution

The fourth proportional to 100,069.72, 149,937.96 and 70,425.34 is: 105,520.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,069.72 : 149,937.96 = 70,425.34 : x
  2. Step 2: Convert to fraction form
    100,069.72/149,937.96 = 70,425.34/x
  3. Step 3: Cross multiply
    100,069.72x = 149,937.96 × 70,425.34
  4. Step 4: Simplify right side
    100,069.72x = 10,559,431,811.91
  5. Step 5: Solve for x
    x = 10,559,431,811.91/100,069.72
  6. Step 6: Final answer
    x = 105,520.75

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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.