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Finding the Fourth Proportional to 113,318,671.20, 169,978,006.80 and 72,504,002.40

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Solution

The fourth proportional to 113,318,671.20, 169,978,006.80 and 72,504,002.40 is: 108,756,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,318,671.20 : 169,978,006.80 = 72,504,002.40 : x
  2. Step 2: Convert to fraction form
    113,318,671.20/169,978,006.80 = 72,504,002.40/x
  3. Step 3: Cross multiply
    113,318,671.20x = 169,978,006.80 × 72,504,002.40
  4. Step 4: Simplify right side
    113,318,671.20x = 12,324,085,812,974,418
  5. Step 5: Solve for x
    x = 12,324,085,812,974,418/113,318,671.20
  6. Step 6: Final answer
    x = 108,756,003.60

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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.