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Finding the Fourth Proportional to 118,441.80, 177,662.70 and 78,870.60

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Solution

The fourth proportional to 118,441.80, 177,662.70 and 78,870.60 is: 118,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,441.80 : 177,662.70 = 78,870.60 : x
  2. Step 2: Convert to fraction form
    118,441.80/177,662.70 = 78,870.60/x
  3. Step 3: Cross multiply
    118,441.80x = 177,662.70 × 78,870.60
  4. Step 4: Simplify right side
    118,441.80x = 14,012,363,746.62
  5. Step 5: Solve for x
    x = 14,012,363,746.62/118,441.80
  6. Step 6: Final answer
    x = 118,305.90

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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.