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Finding the Fourth Proportional to 99,645,703.80, 149,468,555.70 and 89,568,007.80

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Solution

The fourth proportional to 99,645,703.80, 149,468,555.70 and 89,568,007.80 is: 134,352,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,645,703.80 : 149,468,555.70 = 89,568,007.80 : x
  2. Step 2: Convert to fraction form
    99,645,703.80/149,468,555.70 = 89,568,007.80/x
  3. Step 3: Cross multiply
    99,645,703.80x = 149,468,555.70 × 89,568,007.80
  4. Step 4: Simplify right side
    99,645,703.80x = 13,387,600,762,792,332
  5. Step 5: Solve for x
    x = 13,387,600,762,792,332/99,645,703.80
  6. Step 6: Final answer
    x = 134,352,011.70

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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.