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Finding the Fourth Proportional to 70,963.20, 106,291.20 and 43,315.20

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Solution

The fourth proportional to 70,963.20, 106,291.20 and 43,315.20 is: 64,879.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,963.20 : 106,291.20 = 43,315.20 : x
  2. Step 2: Convert to fraction form
    70,963.20/106,291.20 = 43,315.20/x
  3. Step 3: Cross multiply
    70,963.20x = 106,291.20 × 43,315.20
  4. Step 4: Simplify right side
    70,963.20x = 4,604,024,586.24
  5. Step 5: Solve for x
    x = 4,604,024,586.24/70,963.20
  6. Step 6: Final answer
    x = 64,879.04

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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.