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Finding the Fourth Proportional to 117,872.80, 176,809.20 and 99,210.40

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Solution

The fourth proportional to 117,872.80, 176,809.20 and 99,210.40 is: 148,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,872.80 : 176,809.20 = 99,210.40 : x
  2. Step 2: Convert to fraction form
    117,872.80/176,809.20 = 99,210.40/x
  3. Step 3: Cross multiply
    117,872.80x = 176,809.20 × 99,210.40
  4. Step 4: Simplify right side
    117,872.80x = 17,541,311,455.68
  5. Step 5: Solve for x
    x = 17,541,311,455.68/117,872.80
  6. Step 6: Final answer
    x = 148,815.60

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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.