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Finding the Fourth Proportional to 72,815.29, 100,516.14 and 48,955.86

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Solution

The fourth proportional to 72,815.29, 100,516.14 and 48,955.86 is: 67,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,815.29 : 100,516.14 = 48,955.86 : x
  2. Step 2: Convert to fraction form
    72,815.29/100,516.14 = 48,955.86/x
  3. Step 3: Cross multiply
    72,815.29x = 100,516.14 × 48,955.86
  4. Step 4: Simplify right side
    72,815.29x = 4,920,854,077.58
  5. Step 5: Solve for x
    x = 4,920,854,077.58/72,815.29
  6. Step 6: Final answer
    x = 67,579.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.