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Finding the Fourth Proportional to 70,391.64, 105,586.58 and 28,270.94

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Solution

The fourth proportional to 70,391.64, 105,586.58 and 28,270.94 is: 42,406.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.64 : 105,586.58 = 28,270.94 : x
  2. Step 2: Convert to fraction form
    70,391.64/105,586.58 = 28,270.94/x
  3. Step 3: Cross multiply
    70,391.64x = 105,586.58 × 28,270.94
  4. Step 4: Simplify right side
    70,391.64x = 2,985,031,867.99
  5. Step 5: Solve for x
    x = 2,985,031,867.99/70,391.64
  6. Step 6: Final answer
    x = 42,406.06

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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.