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Finding the Fourth Proportional to 117,937.20, 176,905.80 and 80,612.40

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Solution

The fourth proportional to 117,937.20, 176,905.80 and 80,612.40 is: 120,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,937.20 : 176,905.80 = 80,612.40 : x
  2. Step 2: Convert to fraction form
    117,937.20/176,905.80 = 80,612.40/x
  3. Step 3: Cross multiply
    117,937.20x = 176,905.80 × 80,612.40
  4. Step 4: Simplify right side
    117,937.20x = 14,260,801,111.92
  5. Step 5: Solve for x
    x = 14,260,801,111.92/117,937.20
  6. Step 6: Final answer
    x = 120,918.60

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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.