Home / 117,979.20-176,968.80-80,654.40

Finding the Fourth Proportional to 117,979.20, 176,968.80 and 80,654.40

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Solution

The fourth proportional to 117,979.20, 176,968.80 and 80,654.40 is: 120,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,979.20 : 176,968.80 = 80,654.40 : x
  2. Step 2: Convert to fraction form
    117,979.20/176,968.80 = 80,654.40/x
  3. Step 3: Cross multiply
    117,979.20x = 176,968.80 × 80,654.40
  4. Step 4: Simplify right side
    117,979.20x = 14,273,312,382.72
  5. Step 5: Solve for x
    x = 14,273,312,382.72/117,979.20
  6. Step 6: Final answer
    x = 120,981.60

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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.