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Finding the Fourth Proportional to 76,639,105.60, 114,958,658.40 and 72,859,969.60

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Solution

The fourth proportional to 76,639,105.60, 114,958,658.40 and 72,859,969.60 is: 109,289,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,639,105.60 : 114,958,658.40 = 72,859,969.60 : x
  2. Step 2: Convert to fraction form
    76,639,105.60/114,958,658.40 = 72,859,969.60/x
  3. Step 3: Cross multiply
    76,639,105.60x = 114,958,658.40 × 72,859,969.60
  4. Step 4: Simplify right side
    76,639,105.60x = 8,375,884,356,280,784
  5. Step 5: Solve for x
    x = 8,375,884,356,280,784/76,639,105.60
  6. Step 6: Final answer
    x = 109,289,954.40

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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.