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Finding the Fourth Proportional to 72,479.55, 108,719.33 and 48,859.95

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Solution

The fourth proportional to 72,479.55, 108,719.33 and 48,859.95 is: 73,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,479.55 : 108,719.33 = 48,859.95 : x
  2. Step 2: Convert to fraction form
    72,479.55/108,719.33 = 48,859.95/x
  3. Step 3: Cross multiply
    72,479.55x = 108,719.33 × 48,859.95
  4. Step 4: Simplify right side
    72,479.55x = 5,312,020,783.53
  5. Step 5: Solve for x
    x = 5,312,020,783.53/72,479.55
  6. Step 6: Final answer
    x = 73,289.93

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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.