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Finding the Fourth Proportional to 72,486.90, 108,730.35 and 48,867.30

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Solution

The fourth proportional to 72,486.90, 108,730.35 and 48,867.30 is: 73,300.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.90 : 108,730.35 = 48,867.30 : x
  2. Step 2: Convert to fraction form
    72,486.90/108,730.35 = 48,867.30/x
  3. Step 3: Cross multiply
    72,486.90x = 108,730.35 × 48,867.30
  4. Step 4: Simplify right side
    72,486.90x = 5,313,358,632.56
  5. Step 5: Solve for x
    x = 5,313,358,632.56/72,486.90
  6. Step 6: Final answer
    x = 73,300.95

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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.