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Finding the Fourth Proportional to 48,311.52, 72,461.12 and 18,709.12

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Solution

The fourth proportional to 48,311.52, 72,461.12 and 18,709.12 is: 28,061.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,311.52 : 72,461.12 = 18,709.12 : x
  2. Step 2: Convert to fraction form
    48,311.52/72,461.12 = 18,709.12/x
  3. Step 3: Cross multiply
    48,311.52x = 72,461.12 × 18,709.12
  4. Step 4: Simplify right side
    48,311.52x = 1,355,683,789.41
  5. Step 5: Solve for x
    x = 1,355,683,789.41/48,311.52
  6. Step 6: Final answer
    x = 28,061.29

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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.