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Finding the Fourth Proportional to 72,421.92, 108,662.88 and 39,102.83

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Solution

The fourth proportional to 72,421.92, 108,662.88 and 39,102.83 is: 58,670.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.92 : 108,662.88 = 39,102.83 : x
  2. Step 2: Convert to fraction form
    72,421.92/108,662.88 = 39,102.83/x
  3. Step 3: Cross multiply
    72,421.92x = 108,662.88 × 39,102.83
  4. Step 4: Simplify right side
    72,421.92x = 4,249,025,580.64
  5. Step 5: Solve for x
    x = 4,249,025,580.64/72,421.92
  6. Step 6: Final answer
    x = 58,670.44

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1.5x scale

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.