Home / 78,768.30-118,152.45-43,338.90

Finding the Fourth Proportional to 78,768.30, 118,152.45 and 43,338.90

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Solution

The fourth proportional to 78,768.30, 118,152.45 and 43,338.90 is: 65,008.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,768.30 : 118,152.45 = 43,338.90 : x
  2. Step 2: Convert to fraction form
    78,768.30/118,152.45 = 43,338.90/x
  3. Step 3: Cross multiply
    78,768.30x = 118,152.45 × 43,338.90
  4. Step 4: Simplify right side
    78,768.30x = 5,120,597,215.31
  5. Step 5: Solve for x
    x = 5,120,597,215.31/78,768.30
  6. Step 6: Final answer
    x = 65,008.35

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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.