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Finding the Fourth Proportional to 117,907.40, 176,861.10 and 87,969.80

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Solution

The fourth proportional to 117,907.40, 176,861.10 and 87,969.80 is: 131,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,907.40 : 176,861.10 = 87,969.80 : x
  2. Step 2: Convert to fraction form
    117,907.40/176,861.10 = 87,969.80/x
  3. Step 3: Cross multiply
    117,907.40x = 176,861.10 × 87,969.80
  4. Step 4: Simplify right side
    117,907.40x = 15,558,435,594.78
  5. Step 5: Solve for x
    x = 15,558,435,594.78/117,907.40
  6. Step 6: Final answer
    x = 131,954.70

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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.