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Finding the Fourth Proportional to 72,503.20, 108,754.88 and 19,920.48

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Solution

The fourth proportional to 72,503.20, 108,754.88 and 19,920.48 is: 29,880.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,503.20 : 108,754.88 = 19,920.48 : x
  2. Step 2: Convert to fraction form
    72,503.20/108,754.88 = 19,920.48/x
  3. Step 3: Cross multiply
    72,503.20x = 108,754.88 × 19,920.48
  4. Step 4: Simplify right side
    72,503.20x = 2,166,449,411.94
  5. Step 5: Solve for x
    x = 2,166,449,411.94/72,503.20
  6. Step 6: Final answer
    x = 29,880.74

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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.