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Finding the Fourth Proportional to 48,300.60, 72,450.90 and 20,215.80

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Solution

The fourth proportional to 48,300.60, 72,450.90 and 20,215.80 is: 30,323.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,300.60 : 72,450.90 = 20,215.80 : x
  2. Step 2: Convert to fraction form
    48,300.60/72,450.90 = 20,215.80/x
  3. Step 3: Cross multiply
    48,300.60x = 72,450.90 × 20,215.80
  4. Step 4: Simplify right side
    48,300.60x = 1,464,652,904.22
  5. Step 5: Solve for x
    x = 1,464,652,904.22/48,300.60
  6. Step 6: Final answer
    x = 30,323.70

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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.