Home / 77,080.32-115,611.84-21,680.64

Finding the Fourth Proportional to 77,080.32, 115,611.84 and 21,680.64

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Solution

The fourth proportional to 77,080.32, 115,611.84 and 21,680.64 is: 32,518.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,080.32 : 115,611.84 = 21,680.64 : x
  2. Step 2: Convert to fraction form
    77,080.32/115,611.84 = 21,680.64/x
  3. Step 3: Cross multiply
    77,080.32x = 115,611.84 × 21,680.64
  4. Step 4: Simplify right side
    77,080.32x = 2,506,538,682.78
  5. Step 5: Solve for x
    x = 2,506,538,682.78/77,080.32
  6. Step 6: Final answer
    x = 32,518.53

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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.