Home / 80,728.32-111,421.44-47,205.12

Finding the Fourth Proportional to 80,728.32, 111,421.44 and 47,205.12

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Solution

The fourth proportional to 80,728.32, 111,421.44 and 47,205.12 is: 65,152.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728.32 : 111,421.44 = 47,205.12 : x
  2. Step 2: Convert to fraction form
    80,728.32/111,421.44 = 47,205.12/x
  3. Step 3: Cross multiply
    80,728.32x = 111,421.44 × 47,205.12
  4. Step 4: Simplify right side
    80,728.32x = 5,259,662,445.77
  5. Step 5: Solve for x
    x = 5,259,662,445.77/80,728.32
  6. Step 6: Final answer
    x = 65,152.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.