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Finding the Fourth Proportional to 86,089.44, 128,856.40 and 44,479.20

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Solution

The fourth proportional to 86,089.44, 128,856.40 and 44,479.20 is: 66,575.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,089.44 : 128,856.40 = 44,479.20 : x
  2. Step 2: Convert to fraction form
    86,089.44/128,856.40 = 44,479.20/x
  3. Step 3: Cross multiply
    86,089.44x = 128,856.40 × 44,479.20
  4. Step 4: Simplify right side
    86,089.44x = 5,731,429,586.88
  5. Step 5: Solve for x
    x = 5,731,429,586.88/86,089.44
  6. Step 6: Final answer
    x = 66,575.29

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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.