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Finding the Fourth Proportional to 109,363,500, 150,866,604 and 72,154,562.40

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Solution

The fourth proportional to 109,363,500, 150,866,604 and 72,154,562.40 is: 99,536,991.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,363,500 : 150,866,604 = 72,154,562.40 : x
  2. Step 2: Convert to fraction form
    109,363,500/150,866,604 = 72,154,562.40/x
  3. Step 3: Cross multiply
    109,363,500x = 150,866,604 × 72,154,562.40
  4. Step 4: Simplify right side
    109,363,500x = 10,885,713,792,394,090
  5. Step 5: Solve for x
    x = 10,885,713,792,394,090/109,363,500
  6. Step 6: Final answer
    x = 99,536,991.71

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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.