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Finding the Fourth Proportional to 48,209.28, 72,300 and 18,620.40

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Solution

The fourth proportional to 48,209.28, 72,300 and 18,620.40 is: 27,925.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,209.28 : 72,300 = 18,620.40 : x
  2. Step 2: Convert to fraction form
    48,209.28/72,300 = 18,620.40/x
  3. Step 3: Cross multiply
    48,209.28x = 72,300 × 18,620.40
  4. Step 4: Simplify right side
    48,209.28x = 1,346,254,920
  5. Step 5: Solve for x
    x = 1,346,254,920/48,209.28
  6. Step 6: Final answer
    x = 27,925.22

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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.