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Finding the Fourth Proportional to 117,940.80, 176,911.20 and 78,369.60

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Solution

The fourth proportional to 117,940.80, 176,911.20 and 78,369.60 is: 117,554.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,940.80 : 176,911.20 = 78,369.60 : x
  2. Step 2: Convert to fraction form
    117,940.80/176,911.20 = 78,369.60/x
  3. Step 3: Cross multiply
    117,940.80x = 176,911.20 × 78,369.60
  4. Step 4: Simplify right side
    117,940.80x = 13,864,459,979.52
  5. Step 5: Solve for x
    x = 13,864,459,979.52/117,940.80
  6. Step 6: Final answer
    x = 117,554.40

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1.5x scale

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.