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Finding the Fourth Proportional to 72,406.60, 108,609.90 and 63,651.40

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Solution

The fourth proportional to 72,406.60, 108,609.90 and 63,651.40 is: 95,477.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,406.60 : 108,609.90 = 63,651.40 : x
  2. Step 2: Convert to fraction form
    72,406.60/108,609.90 = 63,651.40/x
  3. Step 3: Cross multiply
    72,406.60x = 108,609.90 × 63,651.40
  4. Step 4: Simplify right side
    72,406.60x = 6,913,172,188.86
  5. Step 5: Solve for x
    x = 6,913,172,188.86/72,406.60
  6. Step 6: Final answer
    x = 95,477.10

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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.