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Finding the Fourth Proportional to 70,274.29, 105,412.97 and 28,174.20

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Solution

The fourth proportional to 70,274.29, 105,412.97 and 28,174.20 is: 42,261.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,274.29 : 105,412.97 = 28,174.20 : x
  2. Step 2: Convert to fraction form
    70,274.29/105,412.97 = 28,174.20/x
  3. Step 3: Cross multiply
    70,274.29x = 105,412.97 × 28,174.20
  4. Step 4: Simplify right side
    70,274.29x = 2,969,925,835.84
  5. Step 5: Solve for x
    x = 2,969,925,835.84/70,274.29
  6. Step 6: Final answer
    x = 42,261.91

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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.